Synthesis and characterization of optically active and organosoluble poly(amide-imide)s containing imidazole rings as pendent groups by direct polycondensation
Abstract:Six new optically active poly(amide-imide)s (PAIs) 6a-f were prepared by direct polycondensation reaction of N-trimellitylimido-L-histidine 4 as a chiral diacid with various aromatic diamines 5a-f. Triphenyl phosphite (TPP)/pyridine (Py) in the presence of calcium chloride (CaCl 2 ) and N-methyl-2-pyrrolidone (NMP) were successfully applied to direct polycondensation reaction. The resulting new polymers were in good yields, and had inherent viscosities ranging between 0.29 and 0.41 dL g 1 and were detected wi… Show more
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.