Thermoplastic biopolyester natural fiber composites

Shanks, R, Hodzic, A and Wong, S 2004, 'Thermoplastic biopolyester natural fiber composites', Journal of Applied Polymer Science, vol. 91, pp. 2114-2121.


Document type: Journal Article
Collection: Journal Articles

Title Thermoplastic biopolyester natural fiber composites
Author(s) Shanks, R
Hodzic, A
Wong, S
Year 2004
Journal name Journal of Applied Polymer Science
Volume number 91
Start page 2114
End page 2121
Total pages 7
Publisher John Wiley and Sons
Abstract Natural fiber-biopolymer composites have been prepared using flax and poly(3-hydroxylbutyrate) bipolyesters (PHB). The biopolyesters consist of the homopolyester PHB and its copolymers with 5 and 12% 3-hydroxyvalerate (PHV). These biopolymer-natural fiber composites provide structures totally composed of biodegradable and renewable resources. The adhesion between the fibers and the polyesters was better than for analogous polypropylene composites. Wetting of the fibers by the polyesters was observed using scanning electron microscopy. The composites were limited by the properties of the polyesters. PHB is a brittle polymer though flexibility is improved in its copolymers with PHV, but at the expense of crystallization rate. Nucleation was increased by the fibers and silane coupling agent used as adhesion promoter. The melting temperature was influenced by the promoted adhesion and copolymerization. The bending modulus was increased in the composites and dynamic mechanical analysis provided storage modulus of as much as 4 GPa at 25degreesC with a smaller component as the loss modulus. The maximum in the loss modulus curve was taken as the glass transition temperature, and this increased in the composites. The influence of silane coupling agent was found beneficial for the material properties of the biopolyester-flax composites.
Subject Chemical Characterisation of Materials
DOI - identifier 10.1002/app.13289
Copyright notice © 2003 Wiley Periodicals, Inc.
ISSN 0021-8995
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