A Facile Route for the One‐Step Synthesis of New Fully Aromatic Poly(urea‐imide)s
作者： Hossein Behniafar
DOI: 10.1080/10601320600599033
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摘要: The direct preparation of various aromatic poly(urea‐imide)s (5a1 –5b4 ) from N‐[3,5‐bis(trimellitimido)phenyl]phthalimide (1) using diphenylphosphoryl azide (DPPA) was investigated. polymers were obtained by the conversion imide ring‐containing diacid 1 to corresponding di(carbonyl azide) 2 with DPPA and then diisocyanate 3 through Curtius rearrangement compound 2. This followed polyaddition two diamines (4a 4b). In order compensate shortage against diamines, some excess amounts initial triimide‐dicarboxylic acid used. molecular weights resulting evaluated viscometrically. exhibited an excellent solubility in a variety polar solvents. crystallinity nature estimated means WXRD. glass transition temperatures 10% wt loss 5a3 5b3 determined DSC TGA/DTG methods nitrogen atmospher...
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