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Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Argile organique, Organic clay, Arcilla orgánica, Caoutchouc nitrile, Nitrile rubber, Caucho nitrilo, Compatibilisant, Compatibilizer, Compatibilizante, Composé de l'ammonium quaternaire, Quaternary ammonium compound, Amonio cuaternario compuesto, Etude expérimentale, Experimental study, Estudio experimental, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Montmorillonite, Montmorilonita, Nanocomposite, Nanocompuesto, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété rhéologique, Rheological properties, Propiedad reológica, Propriété thermique, Thermal properties, Propiedad térmica, Propriété traction, Tensile property, Propiedad tracción, Relation mise en oeuvre propriété, Property processing relationship, Relación puesta en marcha propiedad, SBR, Température transition vitreuse, Glass transition temperature, Temperatura transición vítrosa, Traitement surface, Surface treatment, Tratamiento superficie, Viscoélasticité, Viscoelasticity, Viscoelasticidad, Vulcanisat, Vulcanizate, and Vulcanizado

Different montmorillonites either, completely hydrophilic (Mont-0), amphiphilic (Mont-25, Mont-50, and Mont-75) or completely hydrophobic (Mont-100) were used as reinforcing fillers for styrene butadiene rubber (SBR) and acrylonitrile butadiene rubber (NBR) individually to predict the influence of the different forms on the properties of the rubbers (rheometric characteristics and mechanical properties). The shifts in the glass transition temperatures after the clay insertion were determined from dynamic mechanical thermal analysis to investigate the preference and action of each form. In addition, the storage moduli were used as indications to the corresponding mechanical properties of the samples. The influences could be followed after comparing the impacts of aging conditions on the properties of rubber compositions. The obtained data may provide a platform to suggest the mechanism by which these forms can in some cases act as compatibilizers in addition to their reinforcing/plasticizing effect when employed with the physically incompatible NBR/SBR (50/50) blend, which helps to optimize the properties of nanocomposites based on these blends. The proposed mechanism of action showed good correlation with the results of the mechanical properties and x-ray diffraction investigations as well. .

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Conductivité électrique superficielle, Surface electrical conductivity, Conductividad eléctrica superficial, Cristallinité, Crystallinity, Cristalinidad, Effet concentration, Concentration effect, Efecto concentración, Etude expérimentale, Experimental study, Estudio experimental, Lactique acide polymère, Lactic acid polymer, Láctico ácido polímero, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Module élasticité, Elastic modulus, Módulo elasticidad, Moulage injection, Injection molding, Moldeo por inyección, Nanocomposite, Nanocompuesto, Nanotube carbone, Carbon nanotubes, Nanotube multifeuillets, Multiwalled nanotube, Polymère aliphatique, Aliphatic polymer, Polímero alifático, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété thermique, Thermal properties, Propiedad térmica, Propriété électrique, Electrical properties, Propiedad eléctrica, Renforcement mécanique, Strengthening, Refuerzo mecánico, Résistance traction, Tensile strength, Resistencia tracción, Stabilité thermique, Thermal stability, Estabilidad térmica, Traitement surface, Surface treatment, Tratamiento superficie, Cristallisation non isotherme, Fusion multiple, Nanotube carbone fonctionnalisé, and Polymère biodégradable

Structural, mechanical, thermal, and electrical properties of low-loaded (0—1.5 wt%), untreated, and treated (with heat and nitric acid) multiwalled carbon nanotubes (MWCNTs)/poly (lactic acid) (PLA) nanocomposites have been studied. Among all synthesized composites, acid-treated 1.0 wt% MWCNTs reinforced PLA shows superior tensile strength and modulus to those shown by other samples. All nanocomposites including the pure PLA exhibit the orthorhombic β-form crystalline structure with low degree of crystallization, as demonstrated by X-ray diffraction study. Differential scanning calorimetry (DSC) of injection molded samples, respectively, reveals an enhancement of PLA crystallinity by 8% and 14% for untreated and treated nanotubes, relating to the observed improvement in mechanical properties. Nanocomposites show double melting behavior when crystallized nonisothermally by DSC, whilst the pure PLA shows single melting character. Thermogravimetric analysis discloses that the MWCNTs-loaded sample degraded faster than PLA. Surface resistivity of the nanocomposites is found to be dropped drastically by a factor of 1013 with a low loading of MWCNTs (1.5 wt%). A detailed discussion and correlation of the observed structures and properties are presented in this study.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Angiospermae, Dicotyledones, Moraceae, Spermatophyta, Alcool copolymère, Alcohol copolymer, Alcohol copolímero, Aminoplaste, Aminoplast, Aminoplasto, Argile, Clay, Arcilla, Bois résineux, Softwood, Madera de coníferas, Capacité rétention eau, Water holding capacity, Capacidad retención agua, Composé de l'ammonium quaternaire, Quaternary ammonium compound, Amonio cuaternario compuesto, Copolymère réticulé, Crosslinked copolymer, Copolímero reticulado, Cristallinité, Crystallinity, Cristalinidad, Etude expérimentale, Experimental study, Estudio experimental, Ficus, Gomme naturelle, Natural gum, Goma natural, Inflammabilité, Flammability, Inflamabilidad, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Morphologie, Morphology, Morfología, Mélange polymère, Polymer blends, Nanocomposite, Nanocompuesto, Oside polymère, Oside polymer, Osido polímero, Polycondensation, Condensation polymerization, Policondensación, Propriété chimique, Chemical properties, Propiedad química, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété thermique, Thermal properties, Propiedad térmica, Propriété traction, Tensile property, Propiedad tracción, Résistance chimique, Chemical resistance, Resistencia química, Résistance flexion, Bending strength, Resistencia flexión, Silice, Silica, Sílice, Stabilité thermique, Thermal stability, Estabilidad térmica, Traitement surface, Surface treatment, Tratamiento superficie, Triazine dérivé copolymère, Triazine derivative copolymer, Triazina derivado copolímero, Composite bois polymère, Ficus hispida, and Furane dérivé copolymère

Wood polymer composites (WPC) based on nano SiO2 and nanoclay were prepared by the impregnation of melamine formaldehyde-furfuryl alcohol copolymer, 1,3-dimethylol 4,5-dihydroxy ethylene urea, a crosslinking agent, and a renewable polymer. Surface modification of SiO2 and formation of composites were characterized by Fourier Transform Infrared Spectroscopy (FTIR). X-ray diffractometry (XRD) studies indicated a decrease in crystallinity of the composites. The crystallinity index value of wood cellulose decreased from 63.8 to 30.8 as determined from FTIR and XRD studies. Scanning Electron Microscopy was used for morphological characterization. Transmission Electron Microscopy (TEM) showed uniform distribution of nano SiO2 and nanoclay in the composites. Remarkable reduction in water uptake capacity was observed for the treated wood samples. It was found to reduce from 142.2% to 30.2%. Both tensile and flexural properties increased upto 76.5% and 23.6%, respectively in the WPCs. An improvement in chemical resistance, flame retardancy and thermal stability were observed in the composites as a result of treatment.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Cinétique, Kinetics, Cinética, Durcissement (matière plastique), Curing (plastics), Endurecimiento (material plástico), Epoxyde résine, Epoxy resin, Epóxido resina, Etude expérimentale, Experimental study, Estudio experimental, Graphène, Graphene, Groupe aminé, Amino group, Grupo aminado, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Morphologie, Morphology, Morfología, Nanocomposite, Nanocompuesto, Propriété dynamomécanique, Dynamic mechanical properties, Propiedad dinamomecánica, Propriété mécanique, Mechanical properties, Propiedad mecánica, Préparation, Preparation, Preparación, Résistance choc, Impact strength, Resistencia choque, Traitement surface, Surface treatment, Tratamiento superficie, and Graphène fonctionnalisé

Graphene, consisted of a single layer of carbon atom in a two-dimensional lattice, has superior electrical and physical properties that promise many exciting applications. In this study, graphenes were prepared from graphite powder by chemical method and their images were investigated by TEM and SEM. To develop high performance epoxy nanocomposites with good dispersion of graphenes and strong epoxy-graphene interfacial bonding, graphenes were amine-functionalized and the effects of the amine-functionalization on the curing behavior and physical properties of epoxy/graphene nanocomposites were studied. FTIR spectra confirmed the amine-functionalization. The physical properties of the nanocomposites were investigated by DSC, DMA, TMA, and impact tester. Fracture surfaces were investigated by SEM. The physical properties of the nanocomposites could be improved considerably by the amine-functionalization of graphenes.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Amidation, Amidación, Effet substituant, Substituent effect, Efecto sustituyente, Ethylène polymère, Polyethylene, Etileno polímero, Etude expérimentale, Experimental study, Estudio experimental, Longueur chaîne, Chain length, Longitud cadena, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Module Young, Young modulus, Módulo Young, Nanocomposite, Nanocompuesto, Nanotube carbone, Carbon nanotubes, Nanotube multifeuillets, Multiwalled nanotube, Oléfine polymère, Olefin polymer, Olefina polímero, Propriété mécanique, Mechanical properties, Propiedad mecánica, Renforcement mécanique, Strengthening, Refuerzo mecánico, Traitement surface, Surface treatment, Tratamiento superficie, and Nanotube carbone fonctionnalisé

Polyethylene (PE) is one of the most produced synthetic resins in the world. Functionalized multiwalled carbon nanotube (MWCNT) is a potential nanoscale filler to realize the next generation strong and multifunctional PE composites. We demonstrate that MWCNTs grafted with short n-alkyl groups are effective nanofillers for mechanical reinforcement of PE composites. At 1 wt% filler loading, the yield stress and Young's modulus improve significantly up to 54 and 63% compared with neat PE, respectively. Among ductile properties, tensile strength increases up to 30%; ultimate strain is preserved; and toughness increases up to 33%. More important, we show that short n-alkyl groups can be grafted on MWCNTs much easier than long chain polymers. Further, we find that alkyl groups of C14-C18 chains have the optimum length for reinforcement. The optimum density of grafted alkyl groups is around 0.390-0.423 μmol/mg when the C14 alkyl groups are used. Overall, the results manifest that MWCNTs grafted with n-alkyl groups with suitable length and density are efficient nanoscale fillers for high-performance PE composites.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Agent accrochage, Coupling agent, Agente enganche, Caoutchouc EPDM, EPDM rubber, Caucho EPDM, Conductivité thermique, Thermal conductivity, Conductividad térmica, Effet concentration, Concentration effect, Efecto concentración, Effet température, Temperature effect, Efecto temperatura, Etude expérimentale, Experimental study, Estudio experimental, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Nanocomposite, Nanocompuesto, Nanotube carbone, Carbon nanotubes, Nanotube multifeuillets, Multiwalled nanotube, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété thermique, Thermal properties, Propiedad térmica, Résistance traction, Tensile strength, Resistencia tracción, Silane organique, Organic silane, Silano orgánico, Stabilité thermique, Thermal stability, Estabilidad térmica, Traitement surface, Surface treatment, Tratamiento superficie, and Résistance ablation

Pristine multiwalled carbon nanotubes (MWCNTs) along with the silane coupling agent were incorporated into ethylene propylene diene monomer (EPDM) rubber using dispersion kneader and two roller mixing mill to fabricate ablative nanocomposites used in hyperthermal environment encountered by space vehicle or rocket motor. The 1 wt% addition of MWCNTS in the rubber matrix has remarkably reduced the backface temperature elevation up to 40°C during the ablation testing of the ablatives. The linear and mass ablation resistances have been diminished up to 125% and 74%, respectively, while insulation indexes at 110°C backface temperature of the composite specimens have been elevated up to 51% with increasing the MWCNTS incorporation into the EPDM matrix. Thermal stability and heat absorbance capability of the polymer composites were progressed with increasing the filler to matrix ratio. Thermal conductivity/impedance of the ablatives have been conducted according to the ASTM E1225-99 and D5470-03, respectively to execute the effect of MWCNTs concentration on the thermal transport characteristics of the tested specimens. Tensile strength of the composite specimen was augmented up to 42% with increasing nanotubes to polymer ratio. Evenly dispersed MWCNTs in the polymer matrix, polymer pyrolysis, and voids formation in the ablated samples can be scrutinized in the scanning electron microscopy images.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Agent surface cationique, Cationic surfactant, Agente superficie catiónico, Argile organique, Organic clay, Arcilla orgánica, Composé de l'ammonium quaternaire, Quaternary ammonium compound, Amonio cuaternario compuesto, Etude expérimentale, Experimental study, Estudio experimental, Lactone polymère, Lactone polymer, Lactona polímero, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Modèle phénoménologique, Phenomenological model, Modelo fenomenológico, Modélisation, Modeling, Modelización, Molécule polyédrique, Polyhedral molecule, Molécula poliédrica, Montmorillonite, Montmorilonita, Morphologie, Morphology, Morfología, Nanocomposite, Nanocompuesto, Oligomère, Oligomer, Oligómero, Perméabilité gaz, Gas permeability, Permeabilidad gas, Polymère optiquement actif, Optically active polymer, Polímero ópticamente activo, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété thermique, Thermal properties, Propiedad térmica, Propriété traction, Tensile property, Propiedad tracción, Propriété transport, Transport properties, Propiedad transporte, Silsesquioxane polymère, Silsesquioxane polymer, Silsesquioxano polímero, Stabilité thermique, Thermal stability, Estabilidad térmica, Traitement surface, Surface treatment, Tratamiento superficie, and Lactide polymère

Three kinds of novel organic montmorillonites (OMMTs) were prepared by reacting the amino polyhedral oligomeric silsesquioxanes (POSSs) with the OMMTs that had already been modified by cationic surfactants. The layer spacing of OMMT increased from 1.68 to 3.81 nm after being intercalated by POSS. Poly(L-lactide) (PLLA) based nanocomposites with montmorillonites were produced by melt compounding. The PLLA nanocomposites with POSS modified OMMT were comprised of a random dispersion of intercalated/exfoliated aggregates of layered silicates throughout the PLLA matrix. The incorporation of POSS modified OMMT resulted in a significant increase in both crystallization temperature and decomposition temperature for 5% weight loss in comparison with the virgin PLLA. Gas Permeation Analysis showed that the increase of the montmorillonite concentration in the polymer matrix led to an expected decrease in permeation values. Gas barrier properties of the nanocomposites were compared with those predicted by phenomenological models such as the Nielsen model and Cussler model.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Calcium Fluorure, Calcium Fluorides, Calcio Fluoruro, Cinétique, Kinetics, Cinética, Cristallinité, Crystallinity, Cristalinidad, Cristallisation état fondu, Melt crystallization, Cristalización estado fundido, Effet concentration, Concentration effect, Efecto concentración, Ester polymère, Ester polymer, Ester polímero, Ethylène téréphtalate polymère, Ethylene terephthalate polymer, Etileno tereftalato polímero, Etude expérimentale, Experimental study, Estudio experimental, Matériau composite, Composite material, Material compuesto, Modèle cinétique, Kinetic model, Modelo cinético, Modélisation, Modeling, Modelización, Phosphine tertiaire oxyde, Tertiary phosphine oxide, Fosfina terciaria óxido, Traitement surface, Surface treatment, Tratamiento superficie, Traitement thermique, Heat treatment, Tratamiento térmico, and Cristallisation non isotherme

Two different types of calcium fluoride particles (~325 nm), one of them surface modified using a long-chain organophosphorous reagent, were incorporated into a poly(ethylene terephthalate) (PET) matrix. The CaF2 particles were synthesized by a simple chemical precipitation method. To modify the particles surface, a heat treatment using Cyanex® 921 (tri-n-octylphosphine oxide (TOPO)] dissolved in isopropanol, was carried out. Therefore, unlike the as-synthesized particles, the modified particles contained an amount of TOPO. The composite materials were prepared by melt-blending PET and particles at different filler loadings. The influence of the particles surface modification on the nonisothermal crystallization behavior of PET was investigated by using differential scanning calorimetry and field emission scanning electron microscopy. The Jeziorny-modified Avrami equation was applied to describe the crystallization kinetics and several parameters were analyzed (half-crystallization time, Avrami exponent, and rate constant). According to the results, the fluorite particles act as nucleating agents, accelerating the PET crystallization rate. However, the effect on the polymer crystallization rate was more noticeable with the addition of the nonmodified particles where the surface might play an important role for epitaxial crystallization, while the addition of the particles, with an organic coating layer on the surface, resulted in a crystallization behavior more similar to the observed for neat PET.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Argile, Clay, Arcilla, Effet concentration, Concentration effect, Efecto concentración, Ethylène polymère, Polyethylene, Etileno polímero, Extrusion, Extrusión, Film, Película, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Morphologie cristalline, Crystal morphology, Morfología cristalina, Nanocomposite, Nanocompuesto, Oléfine polymère, Olefin polymer, Olefina polímero, Perméabilité gaz, Gas permeability, Permeabilidad gas, Porosité, Porosity, Porosidad, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété optique, Optical properties, Propiedad óptica, Propriété traction, Tensile property, Propiedad tracción, Propriété transport, Transport properties, Propiedad transporte, Relation structure propriété, Property structure relationship, Relación estructura propiedad, Sépiolite, Sepiolite, Sepiolita, Traitement surface, Surface treatment, Tratamiento superficie, Transparence, Transparency, and Transparencia

Polyethylene (PE) is the most used thermoplastic commodity as a consequence of its convenient cost-processing-performance relationship and it can be used in the form of films for food, goods and farming packaging. On the other hand, sepiolite is a high surface area and porosity hydrated magnesium silicate with both remarkable adsorptive and absorptive properties. Thus, PE and sepiolite can combine their properties synergetically to obtain new materials with enhanced properties. In this work, a systematic study of final properties of PE-sepiolite nanocomposite films was performed to investigate the influence of the sepiolite content and modification on the PE properties. Nanocomposites films with 1, 3, 5 and 10 wt % of sepiolite, with and without surface modification, were prepared by cast film extrusion and tested. The filler dispersion and distribution were evaluated by Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FTIR), whereas the film crystalline morphology was analyzed using Atomic Force Microscopy (AFM), Differential Scanning Calorimetry (DSC) and X-ray Diffraction (XRD). Final properties as mechanical ones, oxygen permeability and transparency were also studied and related with the film structure. Mechanical properties, crystallization and oxygen permeability were increased maintaining good film translucency.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Fibres et fils, Fibers and threads, Aniline polymère, Aniline polymer, Anilina polímero, Capteur pression, Pressure sensor, Captador presión, Contrainte compression, Compressive stress, Tensión compresión, Etude expérimentale, Experimental study, Estudio experimental, Fibre coco, Coconut fiber, Fibra coco, Fibre naturelle, Natural fiber, Fibra natural, Fibre revêtue, Coated fiber, Fibra revestida, Fibre végétale, Plant fiber, Fibra vegetal, Morphologie, Morphology, Morfología, Plan expérience, Experimental design, Plan experiencia, Polymère aromatique, Aromatic polymer, Polímero aromático, Polymère conducteur, Conducting polymers, Polymérisation oxydante, Oxidative polymerization, Polimerizacion oxidante, Propriété électrique, Electrical properties, Propiedad eléctrica, Propriété électromécanique, Electromechanical properties, Propiedad electromecánica, Relation mise en oeuvre propriété, Property processing relationship, Relación puesta en marcha propiedad, Résistivité électrique, Electric resistivity, Resistividad eléctrica, Traitement magnétique, Magnetic treatment, Tratamiento magnético, Traitement par ultrasons, Ultrasonic treatment, Tratamiento por ultrasonido, Traitement surface, Surface treatment, and Tratamiento superficie

This article studies the modification of coconut fibers with polyaniline (PAni) with help of statistical experimental design techniques. The main factors studied here were the techniques used for particle dispersion (sonication vs. magnetic stirring) and the type of initiator (ammonium persulfate, APS, vs. ammonium cerium sulfate dihydrate, Ce(IV)). The obtained materials were characterized through low field nuclear magnetic resonance, small-and wide-angle X-ray scattering, scanning electron microscopy, fourier transform infrared spectroscopy, and ultraviolet-visible spectroscopy. Additionally, the electrical resistivities and respective sensitivities to variations of the applied pressure were evaluated for all obtained samples, with help of standard volume resistivity measurements and electromechanical tests. The materials prepared through magnetic stirring with APS presented the best electrical and electromechanical properties, although materials prepared through sonication with Ce(IV) also presented good electrical and electromechanical properties and could be prepared much faster. As a consequence, modification of coconut fibers with PAni, using sonication as the particle dispersion technique and Ce(IV) as initiator, constitutes a very promising procedure for manufacture of pressure-sensitive devices.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Agent surface non ionique, Non ionic surfactant, Agente superficie no iónica, Agent surface polymère, Surfactant polymer, Agente superficie polímero, Epoxyde résine, Epoxy resin, Epóxido resina, Ether cyclique polymère, Cyclic ether polymer, Eter cíclico polímero, Ethylène oxyde polymère, Ethylene oxide polymer, Etileno óxido polímero, Etude expérimentale, Experimental study, Estudio experimental, Interaction matière charge polymère, Polymer filler interaction, Interacción materia carga polímero, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Mécanisme réaction, Reaction mechanism, Mecanismo reacción, Potassium Titanate, Potassium Titanates, Potasio Titanato, Propriété mécanique, Mechanical properties, Propiedad mecánica, Relation mise en oeuvre propriété, Property processing relationship, Relación puesta en marcha propiedad, Résistance choc, Impact strength, Resistencia choque, Résistance flexion, Bending strength, Resistencia flexión, Silane organique, Organic silane, Silano orgánico, Traitement surface, Surface treatment, and Tratamiento superficie

The article presents research on the mechanical properties of epoxy resin modified with potassium polytitanate small additives. The influence of the surface modification of potassium polytitanate particles on their properties and interaction with epoxy resins and the mechanical properties of the resulting composite were investigated. The interactions among the dressing additives, binders and fillers were determined. The study shows the dependence of properties of composite materials on the content of dressing additives and method of filling with potassium polytitanate. This study also highlights possible reasons for variation in the mechanical properties of epoxy resin filled with potassium polytitanate particles.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Agent accrochage, Coupling agent, Agente enganche, Distribution masse moléculaire, Molecular weight distribution, Distribución masa molecular, En discontinu, Batchwise, En discontinuo, En semi continu, Semicontinuous, En semicontinuo, Etude expérimentale, Experimental study, Estudio experimental, Matériau composite, Composite material, Material compuesto, Morphologie, Morphology, Morfología, Mésoporosité, Mesoporosity, Mesoporosidad, Méthacrylate de méthyle polymère, Methyl methacrylate polymer, Metacrilato de metilo polímero, Polymérisation radicalaire, Free radical polymerization, Polimerización radicalar, Polymérisation émulsion, Emulsion polymerization, Polimerización emulsión, Préparation, Preparation, Preparación, Relation mise en oeuvre structure, Structure processing relationship, Relación puesta en marcha estructura, Silane organique, Organic silane, Silano orgánico, Silice, Silica, Sílice, Traitement surface, Surface treatment, Tratamiento superficie, and Particule poreuse

Rod-like and spherical mesoporous SBA-15 silica particles were synthesized as pure silicas and surface modified by organosilane coupling agents firstly, and then the effects of these mesoporous materials on the critical micelle concentration (CMC) of sodium dodecylsulfate (SDS), the stabilities of batch and semi-continuous MMA emulsion polymerizations, and the molecular weights and molecular weight distributions of the polymer products were studied. The incorporation of both unmodified and silane-modified forms of the mesoporous silica particles in the polymerization reaction increased the CMC of SDS. The presence of the unmodified mesoporous silica in the polymerization process led to instability in the batch emulsion polymerization process, as indicated by the formation of increased amounts of coagulum, and a decrease in the molecular weight of the polymer product. However, in comparison to the polymer formed in the absence of particle additives the molecular weight of the PMMA polymer increased with the amount of emulsifier and the addition of silane-modified SBA-15 particles, suggesting the growth of the polymer chains is facilitated at least in part by reaction in the pores of the particles. The improvement in molecular weight indicates that semi-continuous MMA emulsion polymerization is best suited for the preparation of PMMA-mesoporous silica composites.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Conductivité électrique, Electrical conductivity, Conductividad eléctrica, Effet Joule, Joule effect, Efecto Joule, Effet concentration, Concentration effect, Efecto concentración, Epoxyde résine, Epoxy resin, Epóxido resina, Etude expérimentale, Experimental study, Estudio experimental, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Morphologie, Morphology, Morfología, Nanocomposite, Nanocompuesto, Nanotube carbone, Carbon nanotubes, Nanotube multifeuillets, Multiwalled nanotube, Propriété thermique, Thermal properties, Propiedad térmica, Propriété électrique, Electrical properties, Propiedad eléctrica, Traitement surface, Surface treatment, Tratamiento superficie, and Nanotube carbone fonctionnalisé

The electrical and thermal behavior of epoxy composites reinforced with different contents of multi-walled carbon nanotubes (from 0.1 to 0.4 wt% CNT) is studied when they are subjected to relatively high DC voltages (from 1 to 100 V). These materials obey Ohm's law, reaching values of electrical conductivity in the range of 0.01-0.5 S/m. The transported electric current leads to a significant increase of temperature, which is a result of the Joule heating effect. The temperature increases to 40°C in CNT/epoxy composites when applying 100 V. The study of heating due to Joule's effect gives information about the electrical transport mechanisms implied. It is also confirmed that both, electrical conductivity and Joule's heating effect depend on the morphological features of the composites. The functionalization of CNTs decreases the electrical conductivity of composites but increases their corresponding Joule heating, due to the strong interface between the nanotubes and matrix, which hinders the formation of pathways in CNT in direct contact. The technique of CNT dispersion applied also affects to the increase of temperature induced by the electrical current.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Caprolactone polymère, Polycaprolactone, Caprolactona polímero, Cristallinité, Crystallinity, Cristalinidad, Etude expérimentale, Experimental study, Estudio experimental, Huile ricin, Castor oil, Aceite ricino, Huile végétale, Vegetable oil, Aceite vegetal, Lactone polymère, Lactone polymer, Lactona polímero, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Morphologie, Morphology, Morfología, Nanocomposite, Nanocompuesto, Perte mécanique, Mechanical loss, Pérdida mecánica, Polyaddition, Poliadición, Polymère aliphatique, Aliphatic polymer, Polímero alifático, Polymère greffé, Graft polymers, Polymère réticulé, Crosslinked polymer, Polímero reticulado, Polymérisation ouverture cycle, Ring opening polymerization, Polimerización abertura ciclo, Polyol, Poliol, Propriété dynamomécanique, Dynamic mechanical properties, Propiedad dinamomecánica, Propriété thermique, Thermal properties, Propiedad térmica, Préparation, Preparation, Preparación, Silice, Silica, Sílice, Stabilité thermique, Thermal stability, Estabilidad térmica, Traitement surface, Surface treatment, Tratamiento superficie, Uréthanne polymère, Polyurethane, and Uretano polímero

Silica nanoparticles (SNs) were grafted with ε-caprolactone using an environmentally friendly approach. By using tartaric acid as a catalyst and the silanol groups as initiators, grafted nanoparticles (GNs) with organic weight fractions (Wof) within the range 0-46 wt% were synthesized. Thermogravimetric (TGA) and infrared analysis were used to measure the Wof and to corroborate the covalent bond between the SN and the caprolactone monomer. Transmission electron micrographs of the polyurethane (PU) nanocomposites based on the SN and the GN revealed that the interfacial area of the GN-based PU increased by the reduction of agglomerate dimensions from 10 μm to around 0.1 μm. Dynamic mechanical analysis showed that the GN nanocomposites improved the storage shear modulus from 616±11 to 849±8 MPa for a GN with Wof = 16.7% and 3 wt% filler concentration. In addition, the GN particles prevented a relevant decrease of the transition temperature (Tg). Differential scanning calorimetry corroborated that GN increased the enthalpic energy associated to the physical crosslinking of the hard segments (HS). Wide-angle X-ray diffraction proved that the GN formed a HS structure with improved crystallinity. The thermal stability of the GN-based PU a nanocomposite was improved by an increase of the thermal stability of the castor oil soft segments.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Constituants de formulation, Compounding ingredients, Divers, Miscellaneous, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Additif, Additive, Aditivo, Addition chimique, Addition reaction, Adición química, Agent surface non ionique, Non ionic surfactant, Agente superficie no iónica, Antivoile, Antifogging agent, Antivela, Copolymère greffé, Graft copolymer, Copolímero injertado, Diffusion molécule, Molecule scattering, Difusión molécula, Ethylène polymère, Polyethylene, Etileno polímero, Etude expérimentale, Experimental study, Estudio experimental, Matériau composite, Composite material, Material compuesto, Migration, Migración, Monoglycéride, Monoglyceride, Monoglicérido, Mécanisme réaction, Reaction mechanism, Mecanismo reacción, Oléfine polymère, Olefin polymer, Olefina polímero, Particule sous micronique, Submicron particle, Partícula submicrónica, Propriété surface, Surface properties, Propiedad superficie, Silice, Silica, Sílice, Traitement surface, Surface treatment, Tratamiento superficie, and Glycérol(O-oléoyl)

Transparent plastic films are widely used in agriculture as greenhouses covering and in the food industry as packaging films. The films are usually prepared by hydrophobic low polarity thermoplastics such as polyethylene (PE). In a greenhouse, the temperature and humidity are usually higher than the outside temperature and fog will appear on the inner surface of the PE film. Anti-fogging (AF) additives are tensoactive materials, mainly nonionic surfactants, equalizing the PE and water surface tensions, thus creating a thin, continuous film of water rather than discrete droplets. In the present work, a new method of controlled migration of AF is described, by grafting AF molecules to the surface of submicron inorganic particles. Glycerides and fatty acids are used as AF. During the grafting reaction two fractions are formed: attached AF fraction to the inorganic particles' surface, a fraction which cannot be detached by extraction, and an unreacted, thus unattached AF fraction. Solvent extraction, FTIR and TGA measurements have confirmed the existence of the grafted AF molecules to the inorganic particle's surfaces. Aging tests, developed in the present work, have shown a significant decrease of the AF migration rate, thus confirming an extended duration of the anti-fog's activity.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Agent accrochage, Coupling agent, Agente enganche, Composé polyfonctionnel, Polyfunctional compound, Compuesto polifuncional, Durcissement (matière plastique), Curing (plastics), Endurecimiento (material plástico), Effet concentration, Concentration effect, Efecto concentración, Epoxyde résine, Epoxy resin, Epóxido resina, Etude expérimentale, Experimental study, Estudio experimental, Graphène, Graphene, Matériau composite, Composite material, Material compuesto, Module conservation, Storage modulus, Módulo conservación, Morphologie, Morphology, Morfología, Nanocomposite, Nanocompuesto, Propriété rhéologique, Rheological properties, Propiedad reológica, Propriété thermique, Thermal properties, Propiedad térmica, Propriété électrique, Electrical properties, Propiedad eléctrica, Résistivité couche, Sheet resistivity, Resistividad capa, Résistivité électrique, Electric resistivity, Resistividad eléctrica, Silane organique, Organic silane, Silano orgánico, Stabilité dimensionnelle, Size stability, Estabilidad dimensional, Stabilité thermique, Thermal stability, Estabilidad térmica, Température transition vitreuse, Glass transition temperature, Temperatura transición vítrosa, Traitement surface, Surface treatment, Tratamiento superficie, and Nanoplaquette

The physical properties of difunctional epoxies would be improved by adding nanofillers and multifunctional epoxies. Therefore, in this study, a tetrafunctional epoxy was added to difunctional epoxy/GNPs nanocomposites. An aminosilane was used to improve the interfacial bonding between GNPs and the epoxy matrix. The physical properties of the epoxy/GNPs nanocomposites were investigated by DSC, TMA, DMA, and electrical resistivity test. The glass transition temperature and storage modulus of the nanocomposites increased with increasing GNPs content. Adding the aminosilane resulted in a marginal increase in the glass transition temperature of the nanocomposites. However, adding the tetrafunctional epoxy resulted in a considerable increase in the glass transition temperature, thermal dimensional stability, and storage modulus of the nanocomposites. SEM images of the fracture surfaces of the nanocomposites showed that the aminosilane improved the interfacial bonding. The aminosilane and tetrafunctional epoxy made the sheet resistance of the nanocomposites higher. The sheet resistance data showed electrical percolation at 1-2 phr of GNPs. .

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Compatibilisant, Compatibilizer, Compatibilizante, Etude expérimentale, Experimental study, Estudio experimental, Graphite, Grafito, Matériau composite, Composite material, Material compuesto, Matériau renforcé dispersion, Dispersion reinforced material, Material renforzado dispersión, Morphologie, Morphology, Morfología, Nanocomposite, Nanocompuesto, Noir carbone, Carbon black, Carbón negro, Propriété dynamomécanique, Dynamic mechanical properties, Propiedad dinamomecánica, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété thermique, Thermal properties, Propiedad térmica, Relation formulation propriété, Property formulation relationship, Relación formulación propiedad, Traitement surface, Surface treatment, Tratamiento superficie, Vulcanisat, Vulcanizate, Vulcanizado, Vulcanisation, Vulcanization, Vulcanización, Graphite expansé, and SBR carboxylé

Expanded graphite (EG) consists of a huge number of partially exfoliated graphite sheets with the thickness of most of the sheets in the nanometer range. This study analyses the effect of EG and modified EG (MEG) on the mechanical, thermal, and dynamic mechanical properties of solution styrene butadiene rubber (SSBR) with and without carbon black (CB). The surface of the EG was modified to enhance its dispersion in the SSBR matrix. In addition, oil-extended carboxylated styrene butadiene rubber (XSBR) was used as a compatibilizer to disperse MEG in the base nonpolar SSBR matrix. XSBR/MEG nanocomposites have been prepared by solution mixing. The obtained nanocomposites were incorporated into the SSBR matrix in the presence of CB by melt blending. Morphological properties of the nanocomposites revealed intercalation of MEG sheets in the SSBR matrix. Nanocomposites containing MEG in the presence of CB show improvement in mechanical, thermal, and dynamic mechanical properties.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Appareillage et mise en oeuvre, Machinery and processing, Matières plastiques, Plastics, Revêtement, métallisation, coloration, Coating, metallization, dyeing, Sciences biologiques et medicales, Biological and medical sciences, Sciences medicales, Medical sciences, Chirurgie (generalites). Transplantations, greffes d'organes et de tissus. Pathologie des greffons, Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases, Technologie. Biomatériaux. Equipements, Technology. Biomaterials. Equipments, Adhérence cellulaire, Cell adhesion, Adherencia celular, Analyse quantitative surface, Quantitative surface analysis, Análisis cuantitativo superficie, Attaque chimique, Chemical etching, Ataque químico, Biocompatibilité, Biocompatibility, Biocompatibilidad, Biomatériau, Biomaterial, Butyrate(hydroxy) polymère, Butyrate(hydroxy)polymer, Butirato(hidroxi) polímero, Composition chimique, Chemical composition, Composición química, Ester polymère, Ester polymer, Ester polímero, Etude expérimentale, Experimental study, Estudio experimental, Fibroblaste, Fibroblast, Fibroblasto, Morphologie, Morphology, Morfología, Multiplication cellulaire, Cell proliferation, Multiplicación celular, Polymère aliphatique, Aliphatic polymer, Polímero alifático, Propriété biologique, Biological properties, Propiedad biológica, Propriété surface, Surface properties, Propiedad superficie, Rugosité, Roughness, Rugosidad, Temps exposition, Exposure time, Tiempo exposición, Traitement par plasma, Plasma assisted processing, Traitement surface, Surface treatment, and Tratamiento superficie

Properties of pristine and Ar plasma-treated polyhydroxybutyrate (PHB) was studied by different methods as a function of the plasma discharge power and the time from the plasma exposure. Surface polarity was determined by goniometry, surface morphology and roughness was examined by atomic force microscopy, the amount of ablated layer was determined by gravimetry. The chemical structure of the surface was determined by photoelectron spectroscopy. Ablation of the surface layer upon plasma treatment and chemical etching was studied by gravimetry. Cytocompatibility of pristine and modified PHB was studied on mouse embryonic fibroblasts (NIH 3T3). Plasma modification leads to an increase in PHB surface polarity. By aging the surface polarity spontaneously decreases. The amount of ablated layer increases with plasma exposure time and discharge power. The plasma-treated PHB is slightly soluble in water and considerably in methanol. After the plasma treatment the surface morphology and roughness is mildly changed. The plasma treatment improves cell adhesion, proliferation, and spreading homogeneity on the PHB surface.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Fibres et fils, Fibers and threads, Matériaux composites, Composites, Sciences biologiques et medicales, Biological and medical sciences, Sciences medicales, Medical sciences, Chirurgie (generalites). Transplantations, greffes d'organes et de tissus. Pathologie des greffons, Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases, Technologie. Biomatériaux. Equipements, Technology. Biomaterials. Equipments, Biomatériau, Biomaterial, Carbonate copolymère, Carbonate copolymer, Carbonato copolímero, Copolymère aliphatique, Aliphatic copolymer, Copolímero alifático, Cristallinité, Crystallinity, Cristalinidad, Etude expérimentale, Experimental study, Estudio experimental, Extrusion, Extrusión, Fibre synthétique, Synthetic fiber, Fibra sintética, Lactone copolymère, Lactone copolymer, Lactona copolímero, Matériau composite, Composite material, Material compuesto, Matériau renforcé fibre, Fiber reinforced material, Material reforzado fibra, Polycondensation, Condensation polymerization, Policondensación, Presse extrusion monovis, Single screw extruder, Prensa extrusión monotornillo, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété thermique, Thermal properties, Propiedad térmica, Relation composition propriété, Property composition relationship, Relación composición propiedad, Résistance traction, Tensile strength, Resistencia tracción, Résorbable, Absorbable, Reabsorbible, Stent, Terpolymère, Terpolymer, Terpolímero, Traitement par plasma, Plasma assisted processing, Traitement surface, Surface treatment, Tratamiento superficie, Ténacité, Fracture toughness, Tenacidad, Glycolide copolymère, Lactide copolymère, and Triméthylène carbonate copolymère

High molecular weight terpolymers based on L-lactide (LLA), trimethylene carbonate (TMC) and glycolide (GA) are synthesized and characterized with the aim of assessing their potential in the development of bioresorbable cardiovascular stents. The effect of the composition on the thermal and mechanical properties of terpolymers is investigated in comparison with the corresponding PLLA-TMC copolymers as well as a PLLA homopolymer. Incorporation of GA units strongly decreases the crystallinity of PLLA-TMC-GA terpolymers due to its more random microstructure as evidenced by 13C NMR. Meanwhile, the toughness is greatly improved, with only a slight loss of tensile strength. Plasma-treated poly[(L-lactide)-co-glycolide] (PLGA) fibers are used to reinforce the terpolymer matrix. Composite with 8 wt% fibers exhibits much higher tensile strength and modulus. A minitube is fabricated using a single-screw extruder, and a stent prototype is successfully manufactured from a terpolymer by a CNC engraving machine, thus showing the feasibility of the terpolymers for the development of bioresorbable cardiovascular stents.

Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Industrie des polymeres, peintures, bois, Polymer industry, paints, wood, Technologie des polymères, Technology of polymers, Formes d'application et semiproduits, Forms of application and semi-finished materials, Matériaux composites, Composites, Agent accrochage, Coupling agent, Agente enganche, EVA, Etude expérimentale, Experimental study, Estudio experimental, Fibre courte, Short fiber, Fibra corta, Fibre naturelle, Natural fiber, Fibra natural, Fibre végétale, Plant fiber, Fibra vegetal, Matériau composite, Composite material, Material compuesto, Matériau renforcé fibre, Fiber reinforced material, Material reforzado fibra, Mercerisation, Mercerization, Mercerización, Module élasticité, Elastic modulus, Módulo elasticidad, Morphologie, Morphology, Morfología, Peroxyde organique, Organic peroxide, Peróxido orgánico, Propriété biologique, Biological properties, Propiedad biológica, Propriété mécanique, Mechanical properties, Propiedad mecánica, Propriété thermique, Thermal properties, Propiedad térmica, Relation mise en oeuvre propriété, Property processing relationship, Relación puesta en marcha propiedad, Résistance traction, Tensile strength, Resistencia tracción, Silane organique, Organic silane, Silano orgánico, Sisal, Stabilité thermique, Thermal stability, Estabilidad térmica, Traitement surface, Surface treatment, and Tratamiento superficie

Natural fibers (NFs) are rich in cellulose and also they are a low cost, easily renewable source for polymer composites. However, the presence of impurities (waxes, lignin, etc.) and hydroxyl groups produce those NFs with less ability to reinforce polymeric matrices. Short sisal fibers (SSF) were subjected to three different chemical treatments (alkaline, dicumyl peroxide, and silane). Composites of ethylene vinyl acetate (EVA) and chemically modified SSF were prepared by mechanical mixing at the melt state of the polymer matrix (130 C) using a two roll mill. The influences of fiber content and chemical treatment on the mechanical properties of the composites were evaluated. The tensile strength increased for every such treated SSF-reinforced composite. There was also a noticeable increase in elastic modulus compared with the unfilled matrix. The elongation at break values decreased as the fiber content was increased. Moreover, it was observed that the surface treatment of the SSF improved the fiber dispersion within the EVA matrix. The thermal stability of SSF was analyzed by thermogravimetic analysis. Potentially, the recyclability of the composites might be promising due to the lower specific gravity of NF, accompanied by low cost, and with the added advantage of biodegradability.