Poly(Enaminonitriles) Containing Biphenyl and Terphenyl Rings in the Main Chain

摘要

Two new monomers, 4, 4'-bis(1-chloro-2, 2-dicyanovinyl)biphenyl and 4, 4-bis(1-chloro-2, 2-dicyanovinyl)-p-terphenyl, have been synthesized and polymerized with several diamines by vinylic nucleophilic substitution producing poly(enaminonitriles) with molecular weight varying from low to moderately high, depending on the diamines used. The polymers were soluble in polar, aprotic solvents before thermal curing, but became insoluble at high temperatures without the evolution of volatile by products. These new polymers exhibit excellent thermal stability, particularly when they contain para-linked aromatic rings. Dielectric measurements of some of the polymers revealed dielectric constants of at least 4. Poly(enaminonitriles), Biphenyl, Terphenyl, Dielectric measurements.