Structure/transport property relationships within nanoclay-filled polyurethane materials using polycaprolactone-based masterbatches
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- Authors:
- BENALI, Samira
GORRASI, Giuliana
BONNAUD, Leila
DUBOIS, Philippe - Author Affiliations:
- Centre d'Innovation et de Recherche en MAtériaux Polymères CIRMAP, Service des Matériaux Polymères et Composites, Université de Mons - UMONS and MATERIA NAOVA Research Center, Place du Parc 20, 7000 Mons, Belgium
Department of Industrial Engineering, University of Salerno, Via Ponte don Melillo, 84084 Fisciano, Salerno, Italy - Source:
- Composites science and technology. 90:74-81
- Publication Date:
- 2014-01-01
- Language:
- English
- Abstract:
- The lamellar structure of montmorillonite (MMT) clays exhibits an interesting potential to improve the barrier properties of thermoplastic polyurethanes (TPU). However direct melt blending of an ester-based TPU and functional organoclays, despite showing good filler dispersion, did not allowed for improving neither barrier properties (i.e., sorption and diffusion to water vapor) not mechanical performances with respect to the unfilled TPU. Therefore, two alternative strategies involving poly(ε-caprolactone) (PCL)/ organoclay masterbatches were explored to investigate the possibility to prepare materials with improved mechanical and barrier properties. In the first strategy, a PCL/organoclay masterbatch with high inorganic content was obtained by melt-blending (coined free PCL masterbatch), whereas in the second strategy PCL-grafted organoclay nanohybrids, also with high inorganic content were synthesized by in situ intercalative grafting/ring-opening polymerization of ε-caprolactone (CL). Purposely, ROP of CL was initiated from hydroxyl groups available onto the MMT surface actually organo-modified by alkylammonium cations bearing hydroxyl functions (coined nanohybrid PCL masterbatch). These highly-filled PCL masterbatches (with ca. 25 wt% in inorganics) were then added into the ester-based TPU to prepare nanoclay/polyurethane nanocomposites by melt-blending. The morphology and dispersion of the resulting materials were characterized by X-ray diffraction and transmission electron microscopy. Improved sorption and diffusion properties towards water vapor as well as mechanical properties were measured. Herein, these results are discussed as a function of both clay dispersion and matrix/organoclay interaction.
- Notes:
- Polymer industry, paints, wood
- Subjects:
- Chemical industry parachemical industry
Industrie chimique et parachimique
Mechanics acoustics
Mécanique et acoustique
Metallurgy, welding
Métallurgie, soudage
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 thermoplastique
Thermoplastic rubber
Caucho termoplástico
Caprolactone polymère
Polycaprolactone
Caprolactona polímero
Esteruréthanne polymère
Esterurethane polymer
Esteruretano polímero
Etude expérimentale
Experimental study
Estudio experimental
Lactone polymère
Lactone polymer
Lactona polímero
Matériau composite
Composite material
Material compuesto
Montmorillonite
Montmorilonita
Morphologie
Morphology
Morfología
Nanocomposite
Nanocompuesto
Perméabilité vapeur eau
Steam permeability
Permeabilidad vapor agua
Polymère aliphatique
Aliphatic polymer
Polímero alifático
Polymère greffé
Graft polymers
Polymérisation ouverture cycle
Ring opening polymerization
Polimerización abertura ciclo
Propriété mécanique
Mechanical properties
Propiedad mecánica
Propriété thermique
Thermal properties
Propiedad térmica
Propriété transport
Transport properties
Propiedad transporte
Relation structure propriété
Property structure relationship
Relación estructura propiedad
Traitement surface
Surface treatment
Tratamiento superficie
Uréthanne élastomère
Polyurethane elastomer
Uretano elastómero
Mélangeage état fondu
A. Nanoclays
A. Nanocomposites
A. Polymers
B. Thermomechanical properties
B. Transport properties - Format:
- Academic Journal
- Database:
- PASCAL Archive
- Journal:
- Composites science and technology
- Volume:
- 90
- Page Start:
- 74
- Page Count:
- 8
- ISSN:
- 02663538
- Publisher:
- Kidlington: Elsevier, 2014.
- Document Type:
- Article
- Physical Description:
- print, 62 ref
