DSC Studies of the Cure Reactions

In C-fiber-TGDDM-DDS prepregs that do not contain a BF3 amine catalyst one exotherm peak associated with the cure reactions has been observed by DSC 20 22). However, prepregs that contain BF3 amine catalyst have been reported to exhibit 2 or 3 additional DSC peaks at lower temperatures, which have been associated with the catalyzed cure reactions 20 23). 

In this Sect, we report systematic DSC studies of (i) the constituents of boron tri-fluoride monoethylamine (BF3 NH2C2H5) catalyzed TGDDM-DDS epoxies and their mixtures (ii) the nature of the catalyzed cure reactions and (iii) the environmental sensitivity of the BF3 NH2CzH5 catalyst. DSC studies are also reported on the cure reaction characteristics and environmental sensitivity of commercial prepregs that contain BF3 amine catalysts. 

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