Composites of poly(lactic acid) with flax fibers modified by interstitial polymerization

Shanks, R, Hodzic, A and Ridderhof, D 2006, 'Composites of poly(lactic acid) with flax fibers modified by interstitial polymerization', Journal of Applied Polymer Science, vol. 99, no. 5, pp. 2305-2313.

Document type: Journal Article
Collection: Journal Articles

Title Composites of poly(lactic acid) with flax fibers modified by interstitial polymerization
Author(s) Shanks, R
Hodzic, A
Ridderhof, D
Year 2006
Journal name Journal of Applied Polymer Science
Volume number 99
Issue number 5
Start page 2305
End page 2313
Total pages 8
Publisher John Wiley and Sons
Abstract Natural fiber composites were designed and optimized to achieve good mechanical properties and resistance to growth of living organisms. Composite materials were prepared from poly(lactic acid) (PLA) with flax fibers, where the flax fibers had been subjected to interstitial polymerization to replace the water in the cellulose fibers. Before polymerization, the flax fibers were extracted with sodium hydroxide and acetone to remove lignin, pectin, and waxes from the cellulose. Differential scanning calorimetry was used to study the crystallization and melting of the composites as compared with pure PLA. The surface wetting of the fibers and morphology of the composites were studied by scanning electron microscopy and optical microscopy. Mechanical properties were studied using dynamic mechanical analysis. The influence of the interstitial polymerization on the dynamic storage modulus was found to be significant. The composites of polymerization treated flax, with acetone washed fibers, had higher storage moduli than the unwashed fiber composites, which suggested adhesion between flax fibers, and the matrix was improved by the treatments. The composites were subjected to moist environmental conditions to test for development of mold and fungi, and the acetone washed polymerization treated flax composites were resistant to these growths.
Subject Chemical Characterisation of Materials
DOI - identifier 10.1002/app.22531
Copyright notice © 2005 Wiley Periodicals
ISSN 0021-8995
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