Abstract
The objective of this study has been the enhancement of understanding the role of fibre pre-treatment in determining the thermal expansion behaviour and glass transition temperature of fibre-reinforced thermosetting polymers. Asbestos fibres were pre-treated with poly(hexamethylene adipamide) and used afterwards as filler reinforcement in a bisphenol-A-based epoxy matrix. Two alternative processes of fibre pre-treatment were used. Thermal expansion coefficients and glass transition temperatures for the asbestos-nylon-epoxy composites were experimentally determined. Results are qualitatively explained by theoretical models in which the concept of the boundary interphase is considered. The effects of asbestos and nylon content as well as of type of pre-treatment and adhesion between the phases are investigated.
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