Abstract
Coatings on glass fibres, used to reinforce polyepoxide matrices, were examined by Fourier transform infra-red spectroscopy and by their reaction with styrene oxide, aniline, and also water in the vapour phase which was followed calorimetrically and gravimetrically. The coatings comprised an adhesive (of the DGEBA epoxy prepolymer type) applied on its own or together with a coupling agent (γ aminopropyltriethoxysilane). In all tests, these fibres were compared with untreated fibres of a similar type. The results of the studies indicate that the combination of the two coatings forms a reactive mixture within themselves which may inhibit uniform coating of the glass. It is also shown that the coating products on the glass control the process of water diffusion.
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