Abstract
This paper reports an extension of our previous work on the synthesis of poly(arylene sulphones), and describes the preparation of these polymers by the self-condensation of certain dinuclear arylsulphonyl chlorides, catalysed by ferric chloride. In contrast with polyalkylations performed under Friedel-Crafts conditions, it is found that polysulphonylation leads to essentially linear polymers. A detailed structural examination, using i.r. and n.m.r. spectroscopy, of isomeric poly(diphenylene ether sulphones), ▪ is also described. It is shown that the structure of this polymer, prepared by different Friedel-Crafts polysulphonylation reactions, is dependent upon the structure of the monomers.
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