Study and Synthesis of Aromatic Polyimides by Reaction of 3,3'-dimethyl-4,4'-diaminodiphenylmethane

摘要

New aromatic polyimides have been synthesized by polycondensation reaction of 3,3'-dimethyl-4,4'-diaminodiphenylmethane with benzophenontetracarboxylic dianhydride or hexafluoroisopropylidene diphthalic anhydride in N-methylpyrrolidinone as a solvent,followed by chemical imidization in the presence of acetic anhydride and pyridine at 100 deg C for 4h.The obtained polyimides presented excellent solubility,high thermal stability and good film forming ability.The degree of polyimides cure has been observed to have a profound influence on the films fluorescence.