Abstract
AbstractNew polythioesters were synthesized by interfacial polycondensation of bis(4‐mercaptophenyl)sulfide with aliphatic and isomeric phthaloyl chlorides. To determine the optimal conditions for polycondensation, we studied the influence of the following factors on the yield and reduced viscosity: type of organic solvent, concentration and molar ratio of monomers, ratio of aqueous to organic phase, concentration of hydrogen chloride acceptor (NaOH), acid chloride excess, rate of addition of acid chloride, the temperature of reaction, and the kind and the contribution of catalyst. A thorough examination was carried out for the polycondensation of dithiol, with sebacoyl and isophthaloyl chlorides chosen as a model systems. Polythioesters from aliphatic dichlorides were prepared under the optimal conditions used for sebacoyl chloride. For polythioesters from phthaloyl and terephthaloyl chlorides, the conditions were those used for isophthaloyl chloride. The structure of polythioesters was determined from infrared, X‐ray, and elementary analysis. Some physicochemical, thermal, mechanical, and electrical properties are reported. © 1993 John Wiley & Sons, Inc.
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