Aromatic polysulfonates of high molecular weight and purity can easily be prepared by interfacial polycondensation of the disulfonyl chlorides with diphenols. The polymers were found to have a low degree of crystallinity, softening ranges in the region 200–250°C, molecular weights up to 50,000 and a thermal stability under nitrogen to above 300°C.
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Thomson et al. (1964) studied this question.
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