Synthesis and Characterization of New Poly(amide-imide)/organoday Nanocomposites Derived from N,N'-(4,4'-diphtaloyl)-bis-L-α-aminophenyl Acetic Diacid and 1,2-Bis(4-aminophenoxy)ethane

摘要

In this study, a series of polymer/clay nanocomposites (PCNs) materials consisting of organic poly(amide-imide) (PAI) and organo-modified clay content varying from 0 to 10 mass, were successfully prepared by solution dispersion technique. At first, the reactive organoclay was prepared by using protonated L-phenylalanine amino acid as a swelling agent for silicate layers of montmorillonite/Na~+ (MMT/Na~+) via ion-exchange reaction. Then, poly(amide-imide) used as a matrix of nanocomposite was prepared through the polymerization reaction of N,N'-(4,4'-diphtaloyl)-bis-L-α-aminophenyl acetic diacid and l,2-bis(4-aminophenoxy)-ethane in a medium of N-methyl-2-pyrrolidone (NMP) / triphenyl phosphite (TPP) / calcium chloride (CaCl_2) / pyr-idine (py). This polymer was end-capped with amine end groups near the completion of the reaction to interact chemically with organoclay. Finally, PAI/organoclay nanocomposite Films containing 1, 3, 5 and 10