, 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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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