A series of new polyesters were synthesized by polycondensation of aliphatic and aromatic dicarboxylic dichlorides with a novel quinoxaline diol, 2,3-bis (4-hydroxy phenyl)-5-azaquinoxaline (DIOL). The DIOL was synthesized by reacting 4,4 0 -dihydroxy benzil with 2, 3-diaminopyridine (yield: 85%), and characterized by FTIR and 1 H-NMR spectra. All polyesters showed good solubility in most aprotic polar solvents such as NMP (Nmethylpyrrolidone), DMF (dimethylformamide), DMSO (dimethylsulfoxide), DMAc (dimethylacetamide), HMPA (hexamethylenephosphoramide), and Py (pyridine). The inherent viscosity of polyesters was obtained in the range of 1.1-1.22 dL/mg. The glass transition temperatures of the polyesters were in the range of 200-280 C, as determined by DSC. The initial decomposition temperatures of the polyesters were above 300 C and the char yield at 750 C ranged from 30 to 60% under nitrogen atmosphere.
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