Catalytic trimerization of aromatic nitriles for synthesis of polyimide matrix resinsAromatic nitriles may be trimerized at moderate temperature and pressure with p-toluenesulfonic acid as catalyst. Studies were conducted to establish the effect of the reaction temperature, pressure, time, and catalyst concentration on yield of the trimerized product. Trimerization studies were also conducted to establish the effect of substituting electron donating or withdrawing groups on benzonitrile. Preliminary results of using the catalytic trimerization approach to prepare s-triazine cross-linked polyimide/graphite fiber composites are presented.
Document ID
19740045021
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hsu, L.-C. (NASA Lewis Research Center Cleveland, Ohio, United States)