, Volume 15, Issue 1, pp 114-118
Date: 04 Feb 2010

Preparation and characterization of polysulfonamide statistical copolymers from three aromatic diamines

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Abstract

Various polysulfonamide (PSA) statistical copolymers were synthesized by polycondensation of three aromatic diamines and terephthaloyl chloride. The inherent viscosities of the resulting PSA copolymers range from 1.54 to 1.66 dL/g. The precipitated PSA copolymers with feed content of p-phenylene diamine (PPD) being less than 50% (mole fraction) can be redissolved in N-methyl-2-pryrrolidone (NMP) or N,N-dimethylacetamide (DMAc) with lithium chloride of w LiCl = 0.02. All of the PSA copolymers exhibit enhanced tensile strength in comparison with PSA and still maintain excellent thermal stability in either air or nitrogen atmosphere

Foundation item: the National Natural Science Foundation of China (No. 50973059) and the Scientific Research Foundation of 2009 Graduate School of Shanghai University