Polyisophthalamides with pendent acetoxybenzamide or imide groups

Polycondensation reaction of diacid chlorides incorporating 3,4,5,6-tetrachlorophthalimide or 5-(4-acetoxybenzamide) pendent units with different aromatic diamines containing ether, sulfone or isopropylidene linkages gave two series of aromatic polyisophthalamides containing pendent 3,4,5,6-tetrachlorophthalimide or 5-(4-acetoxybenzamide) groups. These polymers were soluble in polar amidic solvents, gave transparent flexible films and showed good thermal stability. Conformational parameters of the polymers were calculated by the Monte Carlo method with allowance for hindered rotation. Several physical properties of these polymers such as solubility, glass transition temperature and initial decomposition temperature were experimental measured and discussed in relation with the rigidity of their chains.