Highly thermo-stable and shock-resistant graphite fiber composites are prepared from tstr (triaryl-s-triazine ring) polyimide having a linear ring-chain structure as described in hus: U.S. patent 4,555,565-Nov. 26, 1985. Preliminary evaluation of their mechanical properties relevant to thermal and shock reduction will be performed under both static and dynamic (infra-red beam) loads at elevated temperatures of 700, 1400, and 2100 deg F. The test results should serve for sensitivity analysis of materials parameters and for trial compositions in combined (thermal/shock) hardened structures development.
