New Optically Actives Polymers Based on N-Trimellitimido-L-phenyl alanine: Synthesis and Properties

Six new optically active copoly(amide-imide)s CoPAIs 7a-f were synthesized through the direct polycondensation reaction of on N-trimellitylimido-L- phenyl alanine 1 with 4,4ʹ-diamino diphenylsulfone 2, 4,4ʹ-diamino diphenylether 3 in the presence of adipic acid 4, fumaric acid 5 and terephthalic acid 6 as a second diacid in a medium consisting of N-methyl-2-pyrrolidone, triphenyl phosphite, calcium chloride and pyridine. The resulted polymers were fully characterized by means of FTIR spectroscopy, elemental analyses, inherent viscosity, solubility tests and UV-vis spectroscopy. Thermal properties of the CoPAIs 7d-f were investigated using thermal gravimetric analysis (TGA and DTG).