Synthesis and characterization of poly(amide sulfonamide)s (PASAs)

New diamino monomers IIa–IIg were synthesized in a two‐step reaction sequence starting from p‐acetamidobenzenesulfonyl chloride. Solution polymerization of these monomers in DMAC with terephthaloyl or isophthaloyl chloride resulted in the formation of a series of 14 poly(amide sulfonamide)s (PASAs) in excellent yield (> 95%). The polymers have in‐trinsic viscosities of 0.32–1.11 dL g⁻¹. Except for polymers IIIa−p and IIId‐p, all other PASAs were readily soluble in aprotic polar solvents including DMAC, DMF, and DMSO. Thermogravimetric analyses of the polymers showed moderate thermal stability with 10% weight loss being recorded in the range of 325–408°C. In addition, these polymers exhibit moderate chemical stabilities toward alkali, acidic, and chromic acid solution. © 1995 John Wiley & Sons, Inc.