New Aromatic Polyamides Containing Pendant Groups

摘要

Aromatic polyamides containing substituted benzamide pendent groups have been synthesized by solution polycondensation of 5-(4-acetoxybenzamido)-isophthaloyl chloride with aromatic diamines of various structure, in N-methylpyrrolidinone (NMP) as a solvent and with pyridine as acid acceptor. These polymers show good thermal stability, with decomposition temperature being above 300℃ and glass transition temperature in the range of 230-310℃, and better solubility in certain solvents such as NMP and dimehylacetamide (DMA) compared with conventional aromatic polyamides. Their solutions can be cast into thin flexible films with good electroinsulating properties.