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New poly(amide‐imide)s synthesis, 16 . Preparation and properties of poly(amide‐imide)s derived from 3,3‐bis[4‐(4‐aminophenoxy) phenyl]phthalide and various bis(trimellitimide)s
Author(s) -
Yang CninPing,
Lin JiunHung
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021961206
Subject(s) - phthalide , imide , polyamide , amide , triphenyl phosphite , polymer chemistry , condensation polymer , pyridine , chemistry , glass transition , polyimide , polymer , organic chemistry , layer (electronics)
A series of novel bis(phenoxy)phthalide‐containing poly(amide‐imide)s 3 were synthesized via direct polycondensation of 3,3‐bis[4‐(4‐aminophenoxy)phenyl]phthalide (BAPP) with various aromatic bis(trimellitimide)s 2 in N ‐methyl‐2‐pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide‐imide)s 3 having inherent viscosities up to 1,68 dL/g were obtained in quantitative yields. Most of the resulting polymers showed an amorphous nature and were readily soluble in polar solvents such as NMP and N , N ‐dimethylacetamide. All the soluble poly(amide‐imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 237–292°C and the 10% weight loss temperatures were above 500°C in nitrogen. The properties of poly(amide‐imide)s 3 were compared with those of the corresponding isomeric poly(amide‐imide)s 3′ prepared from 3,3‐[4‐(4‐trimellitimido‐phenoxy)phenyl]‐phthalide and various aromatic diamines.