Abstract
Background: Various optically active copolymers have been prepared with enhanced in thermal stability.
Objective: To synthesis optically active novel co-polyamide-imides using microwave assisted polycondensation method. To study, it’s thermal stability as well as optical activity.
Methods: The asymmetric diacid imides were prepared by condensation reaction of trimellitic anhydride with equivalent weight of three different amino acids in acetic acid. The melting point, chemical structure and purity of the optically active diacid imides were investigated using elemental analysis, Fourier transform infrared spectroscopy, and proton nuclear magnetic resonance spectroscopy. The series of novel optical active co-poly (amide-imide) contains three different diacid imide units with the same diamine monomer.
Result: The obtained materials are optically active due to presence of amino acid as a functional group. But the starting materials used in the reported work for the synthesis of amide-imide are different than the present work.
Conclusion: The presence of chiral center into the molecule as well as end functional group makes the co-polymer optically and thermally more stable. The morphology study shows formation of uniform chain of PAIs. The broadening of peaks shows the material is more crystalline. The thermally stable and optically active makes these polymers a speciality for speciality application.
Keywords: Active copolymers, asymmetric diacid imides, co-polyamide-imide (co-PAI), Microwave assisted polycondensation technique, thermal stability and morphology study, trimellitic anhydride.
Graphical Abstract
16
1