| Abstract: | A new series of aromatic heterocyclic poly(aryl pyromellitimide-ether)s have been synthesized from various disodium metal bisphenolate salts with an N,N′-bis(p-nitrophenyl)pyromellitimide via aromatic nitro displacement solution polycondensation in dipolar aprotic solvent at elevated temperature. The reaction was rapid and free of side reactions, with good yield. The resultant polymers were characterized by intrinsic viscosity, infrared and 1H-, 13C-NMR spectroscopy. Thermal behavior of the synthesized polymers was evaluated by thermogravimetric analysis and correlated with their structures. The poly(tetraphenyl methane pyromellitimide-ether) showed better thermal stability than the other polymers. © 1996 John Wiley & Sons, Inc. |
