Abstract
AbstractA series of novel bis(phenoxy)‐1‐oxoisoindoline‐containing poly(amide‐imide)s 3 were synthesized by the direct polycondensations of N‐phenyl‐3,3‐bis[4‐(4‐aminophenoxy)‐phenyl]‐1‐oxoisoindoline (1m, NPBA) 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 1,06 dL/g were obtained in quantitative yields. Most of the resulting polymers showed an amorphous nature and were readily soluble in polar solvent such as NMP and N,N‐dimethylacetamide. All of the soluble poly(amide‐imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 277–327°C, and the 10% weight loss temperatures were above 500°C in nitrogen. The properties of poly(amideimide)s 3 were compared with those of the corresponding isomeric poly(amide‐imide)s 3′ prepared from NPBA and various aromatic diamines.
Published Version
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