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Synthesis of new poly(amide–imide)s derived from trimellitylimido‐ L ‐phenylalanine
Author(s) -
Mallakpour Shadpour E,
Hajipour AbdolReza,
Habibi Sakineh
Publication year - 2001
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.633
Subject(s) - imide , specific rotation , polyamide , triphenyl phosphite , benzidine , polymer chemistry , condensation polymer , pyridine , chemistry , amide , monomer , dimethylformamide , yield (engineering) , organic chemistry , materials science , nuclear chemistry , polymer , solvent , metallurgy
N ‐Trimellitylimido‐ L ‐phenylalanine was prepared from the reaction of 1,2,4‐benzenetricarboxylic anhydride with L ‐phenylalanine in N,N ‐dimethylformamide solution at refluxing temperature. The direct polycondensation reaction of the monomer imide‐diacid with 4,4′‐diaminodiphenylsulfone, 4,4′‐diaminodiphenylmethane, 1,4‐phenylenediamine, 1,3‐phenylenediamine, 2,4‐diaminotoluene, 4,4′‐diaminodiphenylether and benzidine was carried out in a medium consisting of triphenyl phosphite, N ‐methyl‐2‐pyrrolidone, pyridine and calcium chloride. The resulting poly(amide–imide)s, PAIs, having inherent viscosities of 0.21–0.45 dlg −1 were obtained in high yield. All of the above compounds were fully characterized by IR spectroscopy and elemental analyses. The optical rotation of all PAIs has also been measured. Some structural characterization and physical properties of these new optically active PAIs are reported. © 2001 Society of Chemical Industry