The Synthesis of Polyamide-lmides from 1, 4, 5-Naphthalenetricarboxylic Anhydride (Part 1)

Abstract

N, N Bis(4, 5 dihydroxycarbonyl-1-naphthoyl) p-phenylenediamine dianhydride (BNPDA) was prepared by the solid phase condensation reaction of 1, 4, 5-naphthalene tricarboxylic anhydride with N, N diaetyl-p-phenylenediamine. Polyamide-imides were synthesized by the bulk polycondensation reaction of BNPDA with aromatic diamihes at high temperatures, and the reaction conditions were investigated. As aromatic diamines, p-phenylenediamine, benzidine, 4, 4 diaminodiphenyl methane, and 4, 4 diaminodiphenyl ether were used. The polymers obtained (1)N(4) were insoluble in organic solvents such as DMF, DMAc, and DMSO, and slightly soluble in conc. H2SO4. Reduced viScosities of polymers increased with rising reaction temperatures. Reduced viscosities of polymers obtained at 3000C were measured in conc. H2SO4solution at 30oa nd their va1 s were O.20 0.35.
In consequence of thermal analyses, it was found that these polymers are degraded at 400N 5000C in nitrogen.