A facile route for the one-step synthesis of new fully aromatic poly(urea-imide)s

作者：Behniafar H^*

来源：Journal of Macromolecular Science Part A-Pure and Applied Chemistry, 2006, 43(4-5): 813-827.

DOI：10.1080/10601320600599033

• direct polycondensation
• poly(urea-imide)s
• diphenylphosphoryl azide
• thermal stability

The direct preparation of various aromatic poly(urea-imide)s (5a(1) - 5b(4)) from N-[3,5-bis( trimellitimido) phenyl] phthalimide ( 1) using diphenylphosphoryl azide ( DPPA) was investigated. The polymers were obtained by the conversion of imide ring-containing diacid 1 to corresponding di(carbonyl azide) 2 with DPPA and then to diisocyanate 3 through the Curtius rearrangement of compound 2. This was followed by polyaddition of 3 with two aromatic diamines (4a and 4b). In order to compensate the diisocyanate shortage against the diamines, some excess amounts of the initial triimide-dicarboxylic acid 1 were used. The molecular weights of the resulting poly( urea-imide) s were evaluated viscometrically. The poly(urea-imide) s exhibited an excellent solubility in a variety of polar solvents. The crystallinity nature of the polymers was estimated by means of WXRD. The glass transition temperatures and the 10% wt loss temperatures of the polymers 5a(3) and 5b(3) were determined by DSC and TGA/DTG methods in nitrogen atmosphere, respectively. The transparent films of the resulting polymers were also prepared by casting the solution.

• 出版日期2006-5