A series of polymers from new diamidedianhydrides of arylene-di(benzene-5-a
mido-1,2-dicarboxylic) anhydride type and aromatic tetraamines (3,3'-diamin
obenzidine and 3,3',4,4'-tetraaminodiphenylether) were synthesized using on
e step high temperature polycondensation in m-cresol and p-chlorophenol at
180 degrees C and low temperature polycondensation. The polymers had a semi
ladder structure. The influence of the monomer structure and polycondensati
on method on the polymer properties has been investigated. (C) 1999 Elsevie
r Science Ltd. All rights reserved.