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Linear polythioesters. XII. Products of polycondensation some isomeric di(mercaptomethyl)trimethylbenzenes with isophthaloyl and terephthaloyl chlorides
Author(s) -
Podkoscielny Wawrzyniec,
Szubinska Stanisława
Publication year - 1987
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1987.070340112
Subject(s) - condensation polymer , terephthaloyl chloride , chloride , benzene , thermogravimetric analysis , hydrogen chloride , chemistry , aqueous solution , polymer chemistry , organic chemistry , catalysis
New polythioesters by interfacial polycondensation of 4,6‐di(mercaptomethyl)‐1,2,3‐trimethyl‐benzene, 3,5‐di(mercaptomethyl)‐1,2,4‐trimethylbenzene, and 2,4‐di(mercaptomethyl)‐1,3,5‐trimethylbenzene with isophthaloyl and terephthaloyl chlorides were obtained. Polycondensation was carried out under the same conditions as established earlier as optimum for synthesis of polythioesters from 2,5‐di(mercaptomethyl)‐1,4‐dimethylbenzene and isophthaloyl chloride. The conditions of polycondensation were as follows: the organic phase benzene/hexane, ratio of aqueous to organic phase 1:1, presence of 100% excess of NaOH as hydrogen chloride acceptor, temperature of reaction 15°C, little excess of acid dichloride with addition time of 8 min, catalyst benzyltriethylammonium chloride. Yield, reduced viscosity and molecular weight for reaction products have been found. The structure of all polythioesters was determined from elemental analysis, infrared (IR) spectra and x‐ray analysis. Thermal properties were defined from the curves of thermogravimetric analysis. Some mechanical and electrical properties of the polythioesters obtained from di(mercaptomethyl)‐trimethylbenzenes and isophthaloyl chloride were determined.