The interfacial behavior of epoxy/glass fiber micro‐composites under cycles of wet and dry environment change was investigated by Fourier Transform Infrared (FTIR) microspectroscopy. The adsorbed water content in the epoxy/fiber interphase under moist conditions is reduced by treating the glass fibers with a silane coupling agent, γ‐aminopropyltriethoxysilane. This results in a significant decrease in the ring‐opening polymerization of epoxy in the epoxy/fiber interphase. It is also found that the wet‐dry cycles cause the significant variation of the residual adsorbed water in the interphase regions. There is an indication that the debonding in the epoxy/silane‐treated fiber interphase is slower than the epoxy/heat‐cleaned fiber interphase.
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Noobut et al. (1999) studied this question.
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