Synthesis of polyenamines by vinylogous nucleophilic substitution polymerization of 1,6‐diethoxy‐1,5‐hexadiene‐3,4‐dione with diamines

Abstract

AbstractNovel polyenamines with inherent viscosities in the 0.2–1.1 range were synthesized by the vinylogous, nucleophilic substitution polymerization of 1,6‐diethoxy‐1,5‐hexadiene‐3,4‐dione with aromatic and aliphatic diamines in polar aprotic solvents at room temperature. The most effective polymerization medium was hexamethylphosphoramide for preparing high‐molecular‐weight polymers from aromatic diamines. The dilute solutions showed a marked decrease in viscosity with time. The aromatic polyenamines began to lose weight around 200°C under thermogravimetric analysis in air and nitrogen.