Thermoplastic nanocomposites filled with wheat straw cellulose whiskers. Part I: Processing and mechanical behavior

W. Helbert; J. Y. Cavaille; A. Dufresne

doi:10.1002/pc.10650

journal article Aug 01, 1996

Thermoplastic nanocomposites filled with wheat straw cellulose whiskers. Part I: Processing and mechanical behavior

W. Helbert J. Y. Cavaille A. Dufresne

Polymer Composites Vol. 17 No. 4 pp. 604-611 · Wiley

View at Publisher Save 10.1002/pc.10650

Abstract

AbstractCellulose microcrystals with dimensions of ∼5 nm × 150–300 nm were obtained from wheat straw. To evaluate the reinforcing effect of these fillers within a thermoplastic matrix, composites with a weight fraction of cellulose ranging from O to 30 wt% were processed by freeze‐drying and molding a mixture of aqueous suspensions of microcrystals and poly(styrene‐co‐butyl acrylate) latex. It was found that these microcrystals, or whiskers, bring a great reinforcing effect at temperatures higher than the glass transition temperature (Tg) of the matrix and improve the thermal stability of the composite. The relaxed modulus increased continuously with the filler content, and for a film containing 30 wt% of whiskers, it was more than a thousand times higher than that of the matrix. This effect is discussed with regard to theoretical calculations based on a mean field approach (Halpin‐Kardos model). It is concluded that the great reinforcement observed seems to be due not only to the geometry and stiffness of the straw cellulose whiskers but also to the interactions of the microcrystals, their topological arrangement, and the probable formation of whisker clusters within the thermoplastic matrix, the cellulose fillers probably being linked through hydrogen bonds.

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References

Details

Published: Aug 01, 1996
Vol/Issue: 17(4)
Pages: 604-611
License: View

Authors

Cite This Article

W. Helbert, J. Y. Cavaille, A. Dufresne (1996). Thermoplastic nanocomposites filled with wheat straw cellulose whiskers. Part I: Processing and mechanical behavior. Polymer Composites, 17(4), 604-611. https://doi.org/10.1002/pc.10650

Thermoplastic nanocomposites filled with wheat straw cellulose whiskers. Part I: Processing and mechanical behavior

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