A study of crosslinking of diglycidylether of bisphenol A (DGEBA) by four copolymers of poly(acrylic acid-co-styrene) having different acid group percentages, in the range 7.6 -76.6%, was done by FTIR. The study was done in the isothermal mode for four different temperatures, the reaction being accelerated by triethylamine. We followed each by temperature and the variation of the area of the epoxy infrared band (912-916 cm Ϫ1 ) versus time. The results showed that the mechanism was complex and depended on the acid composition in the copolymer. Three types of reaction were involved: addition esterification, etherification, and condensation esterification.

Fourier transform infrared spectroscopy (FTIR) was used to follow the curing of the diglycidylether of bisphenol A (DGEBA) typical epoxide resin by poly(styrene-alt-maleic anhydride) (AMS), the reaction being accelerated by triethylamine (TEA) in the presence of methanol. The study was done in an isothermal mode for four temperatures: 85, 82, 80, and 75ЊC. We followed, for each temperature, the variation of the area of the epoxy band (916 cm 01 ) versus time. After 200 min of reaction, the degree of conversion of epoxy is 0.5 at 85ЊC. A postcure at 100ЊC during 96 h allows one to reach a total conversion of epoxy. The reaction mechanism involves three steps to form the tridimensional network.

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