High-Performance Composites from Polyimide Matrix Resins that Utilize a Cross Linking Reaction of Biphenylene End-Caps with Acetylene Units in the Main Chain

摘要

Graphite-reinforced composites were prepared with oligomeric polymides having biphenylene end-caps and acetylene linkages in the polymers chain. The oligomers were crosslinked by the reaction of the biphenylenes with the diphenyl acetylenes to form 9,10- diphenylphenanthrene units. The resulting composites had good mechanical properties. Thermal oxidative aging studies show that the unidirectional graphite fiber composites maintained good mechanical properties up to 1200 h at 316 C. Reprints. (aw)