Preparation of Poly (amide-guanamine) and Poly(pyromellitimide-guanarnine)

Abstract

2, 4-Bis (p-nitroanilino) -6-substituted 1, 3, 5-triazines were prepared by the nitration of corresponding dianilino-1, 3, 5-triazines.2- (m-Nitroanilino) -4- (p-nitroanilino) -6-substituted L 3, 5- triazines were prepared by the nitration of 2-anilino-4- (m-nitroanilino) -6-substituted 1, 3, 5- triazines.2, 4-Bis (aminoanilino) -6-substituted 1, 3, 5-triazines, whose 6-position having no or a substituent such as methyl or phenyl group, were obtained by the reduction of the above dinitro compounds. Poly (amide-guanamine) [A] or poly (pyromellitamic acid-guanamine) [B] was prepared by the reaction of the above diamines with terephthaloyl and isophthaloyl dichlorides or with pyromellitic dianhydride, respectively. Poly (pyromellitimide-guanamine) [C] J was prepared by heating [B] in vacuo. Thermal properties of [A], [B], and [C] were determined by means of the TGA method. Decomposition temperature of [A] was 355∼454°C, that of [B] or [C] obtained from symmetric diamines was 480∼510°C, and that of [B] or [C] obtained from unsymmetric diamines was 450∼480°C.