Synthesis and characterization of silicon‐containing phenylated soluble aramids

Abstract

Abstract New high molecular weight (inherent viscosities, 1.21–0.50 dL/g) aramids having silicon and pendant phenyl groups were synthesized by low temperature interfacial polycondensation technique involving the reaction of acid chlorides: bis(4‐chlorocarbonylphenyl)dimethylsilane and bis(3‐chlorocarbonylphenyl)dimethylsilane with diamines: 2,5‐bis(4‐aminophenyl)‐3,4‐diphenyl‐thiophene and bis(4‐aminophenyl)ether. Copolyamides were obtained by using different proportions of these diamines. All the polymers were completely soluble in organic solvents such as N,N ‐dimethylacetamide, N ‐methyl‐2‐pyrrolidone, and N,N ‐dimethylformamide. Thermal properties were evaluated by thermogravimetry which showed no weight loss below 325°C in both air and nitrogen atmospheres.