Synthesis and Characterization of Poly(Amide-Imide)s Bearing a S-Valine Moiety in Molten Ionic Liquid
作者： Shadpour Mallakpour , Marziyeh Khania
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摘要: A study has been conducted to synthesize highly organosoluble and optically active poly(amide-imide)s via direct solution polycondensation of different aliphatic aromatic diisocyanates with a chiral diacid monomer in the presence molten tetrabutylammonium bromide (TBuAmBr) as ionic liquid, was compared polymerization traditional solvents like N-methyl-2-pyrrolidone (NMP). The step-growth N-trimellitylimido-S-valine (1) an 4,4′-methylenebis(phenyl isocyanate) (MDI) (2a) carried out by four methods pyridine (Py), dibutyltin dilaurate (DBTDL), triethylamine (TEA) catalyst without catalyst, respectively. In these solutions polycondensations amino acid used inducing agent. optimized method MDI for hexamethylene diisocyanate (HDI) (2b), isophorone (IPDI) (2c) tolylene-2,4-diisocyanate (TDI) (2d). resulting polymers ...
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