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Abstract
Several aromatic optically active polyamides (PA)s were synthesized from 5-(2-phthalimidiylpropanoylamino) isophthalic acid with various aromatic diamines via direct polycondensation with triphenyl phosphite and pyridine in the presence of calcium chloride andN-methyl-2-pyrrolidone under microwave irradiation and conventional heating conditions. Under the optimized conditions, the reaction mixture was irradiated for 2 min. with a 100% irradiation power (900 W). The resulting polymers were obtained in high yield and moderate inherent viscosity ranging from 0.35 to 0.60 dL/g. All synthesized polymers showed excellent solubility in amide-type solvents. Thermogravimetric analysis revealed a 10% weight loss temperature and char yield at 600 °C in a nitrogen atmosphere of > 350 °C and > 58%, respectively, which suggests that the resulting PAs have good thermal stability.
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