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PLA/PHBV Films with Improved Mechanical and Gas Barrier Properties

Article dans une revue avec comité de lecture
Author
BOUFARGUINE, Majdi
203902 Institut des Molécules et Matériaux du Mans [IMMM]
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
GUINAULT, Alain
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
MIQUELARD-GARNIER, Guillaume
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
SOLLOGOUB, Cyrille
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/7988
DOI
10.1002/mame.201200285
Date
2013
Journal
Macromolecular Materials and Engineering

Abstract

Blending poly(lactic acid) (PLA) with a small amount of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV; 10 wt%) using a custom multilayer co-extrusion process increases both ductility and gas barrier properties of extruded films compared with neat PLA and classical blending methods. The co-extrusion process allows multiplication of the number of alternate layers of PLA and PHBV within a film. It was observed that for a critical number of theoretical layers, PHBV layers are broken into lamellas. A well-developed lamellar morphology, with thin and long lamellas of highly crystalline PHBV in PLA matrix was obtained. A balance between aspect ratio and crystallinity of the lamellas, and their dispersion within the PLA matrix was needed to obtain films with improved permeability and mechanical properties.

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