The Preparation of Poly(pyromellitimide-guanamine) from 2-Amino-4--(aminoanilino)-6-(aminophenyl)-1, 3, 5-triazines

Abstract

2-Amino-4-(nitroanilino)-6-(nitropheny1)-1, 3, 5-triazines were prepared by the nitration of suitable triazine derivatives.2-Amino-4-(aminoanilino)-6-(aminophenyl)-1, 3, 5-triazines were obtained by the reduction of the above dinitro-compounds. Poly (pyromellitamic acid-guanamine) [A] was prepared by the reaction of the above diamines with pyromellitic dianhydride. The details of the preparation are shown in Table 1. The preparation of poly (pyromellitimide-' guanamine) CBJ from [A] by heating it in vacuo was carried out and the details are shown in Table 2. CAD was soluble in DMSO, DMF and concentrated sulfuric acid, and C BD was soluble in concentrated sulfuric acid but insoluble in common organic solvents as shown in Table 3. The structures of [A] and [B] were confirmed by IR spectra shown in Fig.2. Thermal properties of CAD and C Bp, measured by means of TG and DSC, are shown in Fig.3, Table 4 and Table 5. Decomposition temperatures of [A] and [B] were 500, -550° C, respectively.