Synthesis and characterization of novel aromatic polyamides from 3,4‐bis(4‐aminophenyl)‐2,5‐diphenylpyrrole and aromatic diacid chlorides

Abstract

AbstractA new polymer‐forming monomer, 3,4‐bis(4‐aminophenyl)‐2,5‐diphenylpyrrole, was synthesized in three steps starting from 4′‐nitrodeoxybenzoin. Tetraphenylpyrrole‐containing aromatic polyamides and copolyamides were prepared from the diamine with various aromatic diacid chlorides and from a mixture of the diamine and 4,4′‐oxydianiline with terephthaloyl chloride, respectively. The resultant polymers had inherent viscosities in the 0.3–1.8 dL/g range and were generally soluble in various organic solvents including N,N‐dimethylacetamide and m‐cresol. They have glass transition temperatures in the range of 306–333°C and showed no weight loss below 380°C in both air and nitrogen atmospheres.