ISSN: 0090-3973
Page Count: 5

Performance of Hybrid Reinforcements in PVC Composites: Part I—Use of Surface-Modified Mica and Wood Pulp as Reinforcements
Maldas, D
Research associate and professor, Centre de Recherche en Pâtes et Papiers, Université du Quebec à Trois-Rivières, Québec

Kokta, BV
Research associate and professor, Centre de Recherche en Pâtes et Papiers, Université du Quebec à Trois-Rivières, Québec

(Received 25 November 1991; accepted 27 April 1992)

Abstract

In the present study, the hybird behavior of surfacetreated mica and hardwood chemithermomechanical pulp (CTMP) in PVC composites was investigated. In order to improve the compatibility of wood fibers with PVC and surface-coated mica, CTMP was subjected to different surface modifications by pretreating the fibers with maleic anhydride (MA), a mixture of MA and Na-silicate, and with an inocyanate (PMPPIC). The effect exerted by the concentration of reinforcements, composition of hybrid as well as the treatment of CTMP, on the mechanical properties of the hybrid composites were evaluated. In general, these properties improved compared to those of uncoated CTMP/mica-filled composites. Moreover, PMPPIC treatment renked best followed by MA — and MA + silicat treatments. The optimal concentrations of reinforcements and their compositions, which provided superior properties, varied according to the nature of the trestment of CTMP and of the individual mechanical properties themselves.

Keywords:
thermoplastic composites, PVC, wood fiber, mica, coupling agent, surface modification, compatibility, mechanical properties, hybrid behavior

Paper ID: JTE11744J
DOI: 10.1520/JTE11744J
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