Viscoelastic properties of plasticized PVC reinforced with cellulose whiskers

New nanocomposites are processed with a plasticized poly(vinyl chloride) matrix reinforced by cellulose whiskers whose characteristics are a high aspect ratio and a large interface area. Dynamic mechanical analysis performed on samples reinforced with a filler fraction of up to 12.4 vol % gives the...

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Bibliographic Details
Published in:Journal of applied polymer science 1999-03, Vol.71 (11), p.1797-1808
Main Authors: Chazeau, L., Cavaillé, J. Y., Canova, G., Dendievel, R., Boutherin, B.
Format: Article
Language:English
Subjects:
Applied sciences
cellulose
composite
Composites
Exact sciences and technology
Forms of application and semi-finished materials
mechanical properties
plasticized PVC
Polymer industry, paints, wood
swelling
Technology of polymers
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Summary:New nanocomposites are processed with a plasticized poly(vinyl chloride) matrix reinforced by cellulose whiskers whose characteristics are a high aspect ratio and a large interface area. Dynamic mechanical analysis performed on samples reinforced with a filler fraction of up to 12.4 vol % gives the viscoelastic properties of the composite above and below its glass transition temperature. Different theoretical predictions are proposed to describe this behavior, but none of them is found wholly satisfactory for describing the reinforcing effect of these fillers. A model based on the Halpin–Kardos equation, with the assumption of an immobilized phase around the whiskers, is developed to account for significant decrease in the modulus drop, on passing above the glass transition temperature. The small discrepancy between this model and the experimental modulus measured in the rubber plateau is discussed as a possible effect of a percolating whisker network whose crosslinks are assured by chains adsorbed onto the whisker surface. Swelling experiments support this hypothesis. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 1797–1808, 1999
ISSN:0021-8995
1097-4628
DOI:10.1002/(SICI)1097-4628(19990314)71:11<1797::AID-APP9>3.0.CO;2-E