Abstract

We have been conducting research on the development of heat-resistant composite materials filled with functional short fibers in multi-functional epoxy resin. As part of such effort, the filling effects of pitch-based carbon short fibers were investigated. In addition, the effects of treatment of coupling agents were studied by filling treated fibers into matrices cured with acid anhydride taking the large surface activity of fibers into account. In this report, matrices cured with diamine were investigated and were compared with those cured with acid anhydride. Pitch-based carbon short fibers treated with five types of coupling agents were filled in three types of multi-functional epoxy resin cured with two types of diamine for 22.2 wt%. The dynamic mechanical properties were measured for these materials in the temperature range of -150° C to 300° C. The glass transition temperatures (Tg) for all the tested materials became higher than those filled with short fibers not treated with coupling agents. The ...

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