Synthesis and Characterization of New Copoly(amide-imide)s and Copoly amides with Azo Groups in their Main Chains

Shahab Zomorodbakhsh, Hossein Anaraki-Ardakani and Ehsan Tavahodi

Department of Chemistry, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran.

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ABSTRACT:

New aromatic copoly(amide-imide)s with high inherent viscosities were prepared by direct polycondensation reaction of diacides 2 or 5 and 4-nitro-1,2-phenylendiamine and three different derivatives of diacides 7 as a second diacides using triphenyl phosphite in N-methyl-2-pyrrolidone (NMP)/pyridine solution containing dissolved CaCl₂. Their decomposition temperatures at 10% weight loss in nitrogen atmosphere were above 165 °C and the anaerobic char yield at 600 °C ranged from 46% to 74%. These polymers were readily soluble in various organic solvents and by their casting into transparent, tough and flexible films can be easily achieved.

KEYWORDS:

Copoly(amide-imide)s (CPAIs); Polycondensation; Characterization; Thermostability