Chiral Synthesis And Characterization Of Polyamide-imide

Chiral polyamide imides is a new type of thermal stability of the polymer, can be widely used in microelectronics, aerospace and automotive industries and other fields.Two types of chiral polyamide imide be synthesized in this paper. First to glacial acetic acid as solvent, pyromellitic dianhydride(PMDA), respectively and L-alanine, L-phenylalanine, L-leucine, L-Isoleucine L-Valine Synthesis five chiral imide monomer -s, and then to N-methyl pyrrolidone(NMP) as solvent, xylene(PX) for the azeotropic agent, using five synthetic chiral imide monomer and diphenyl based methane diisocyan -ate(MDI) prepared by the reaction shots of polyamide imideâ… . Chiral synthesis of polyamide-imideâ…¡also used acetic acid as solvent, pyromellitic dianhydri -de(PMDA), respectively and L-alanine, L-phenylalanine, L-leucine, L-differences leucine L-valine was synthesized five chiral imide monomers, and then made into chloride, and the reaction of the amino acid chain extender, and finally with diphenyl diisocyanate reacted chiral poly amide imideâ…¡.On the preparation of chiral imide monomer out the best reaction conditions and ratio of raw materials is discussed and its reaction mechanism was studied. By infrared spectroscopy, nuclear magnetic resonance of the products were characterized.Two classes of chiral polyamide imide structure and properties will be studyed. By infrared spectroscopy, nuclear magnetic resonance, differential scanning calorimetry instrument, comprehensive thermal analysis of polymers were characterized by opponen -ts.Chiral Technology is based on the rise in science. Despite some achievements, but further efforts. Particularly in the synthesis mechanism and further direction to the synthesis of substances of biological development, the application of chiral polymers and chiral and structural aspects of the relationship between the research is to further improve.