Linear polythioesters. XIV. Products of interfacial polycondensation isomeric di(mercaptomethyl) trimethylbenzenes with some aliphatic acid dichlorides

✍ Scribed by Wawrzyniec Podkościelny; Stanisława Szubińska

• Publisher: John Wiley and Sons
• Year: 1988
• Tongue: English
• Weight: 397 KB
• Volume: 35
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1988.070350711

✦ Synopsis

New polythioesters by interfacial polycondensation of 4,6-di(mercaptomethyl)-1,2,3,-trimethylbenzene, 3,5-di(mercaptomethyl)-1,2,4,-trimethylbenzene and 2,4-di(mercaptomethy1)-1,3,5-trimethylbenzene with adipoyl and sebacoyl chlorides were obtained. Process of polycondensation was carried out under the same condition as established earlier as an optimal for synthesis of polythioester from 2,5-di(mercaptomethy1)-1,4-dimethylbenzene and sebacoyl chloride. The conditions of polycondensation process were as follows: the organic phase benzenefiexane (l:l), ratio of aqueous to organic phase 1:1, the presence of 100% excess of NaOH as hydrogen chloride acceptor, temperature of reaction 15"C, little excess of acid dichloride with addition time 8.5 min.

The structure of all polythioesters was determined by elementary analysis, infrared spectra, and X-ray analysis. Initial decomposition and initial intensive decomposition temperature were defined by the curves of thermogravimetric analysis. The molecular weights for these polymers were determined by gel chromatography.