Effects of a Noncoplanar Biphenyldiamine on the Processing and Properties ofAddition Polyimides

摘要

Addition curing polyimides, prepared from noncoplanar 2,2'-bis(trifluoromethyl)4,4' diaminobiphenyl (BTDB) with various dianhydrides were evaluated as high temperature polymer matrix materials. T sub g of these polymers were measured by mechanical methods as well as by thermal mechanical analysis. Physical and mechanical properties as well as the thermo-oxidative stability of neat resins and the corresponding G40-600 graphite fiber reinforced composites were compared to that of PMR-II-50 and V-CAP-75.