Aromatic polyamides. I. Synthesis and characterization of some aromatic polyamides and their model diamides

Abstract

Abstract The synthesis of some wholly aromatic polyamides based on unsubstituted and chloro‐ and nitro‐substituted diamines by low temperature solution polymerization is described. Poly(1,3‐phenylene isophthalamide) and poly(chloro‐2,4‐phenylene isophthalamide) were selected for further investigation. To study the two polyamides on a systematic basis their model diamides were synthesized. These materials were characterized with respect to chemical structure and purity by elemental analysis, infrared (IR), and nuclear magnetic resonance (NMR) spectroscopic techniques. The usefulness of the model compounds in the interpretation of the polymer spectra is also demonstrated.