Linear polythioesters. XIII.. Products of polycondensation of isomeric di(mercaptomethyl)–dimethylbenzenes with adipoyl and sebacoyl chlorides†
Linear polythioesters. XIII.. Products of polycondensation of isomeric di(mercaptomethyl)–dimethylbenzenes with adipoyl and sebacoyl chlorides†
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DOI：
10.1002/app.1988.070350108
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发表时间：
1988
影响因子：
3
通讯作者：
W. Podkościelny;S. Szubińska
中科院分区：
文献类型：
--
作者：
W. Podkościelny;S. Szubińska
以4，5-二（巯基甲基）-1，2-二甲苯、4，6-二（巯基甲基）-1，3-二甲苯和2，5-二（巯基甲基）-1，4-二甲苯为原料，分别与己二酰和癸二酰氯缩聚，合成了一种新型芳香族聚硫酯。以2，5-二（巯基甲基）-1，4-二甲基苯和癸二酰氯为原料，通过界面缩聚、低温溶液缩聚和高温溶液缩聚制备了聚硫酯，确定了最佳工艺条件。为了确定缩聚反应的最佳条件，研究了以下参数：有机溶剂的种类、试剂的浓度、反应温度和时间，并且在界面缩聚的情况下，考虑了水与有机相的比例、盐酸受体的种类和浓度以及催化剂的种类和浓度。所得缩聚物的质量基于比浓粘度和产率的值来估计。通过元素分析、红外光谱和X射线衍射分析确定了芳香族聚硫酯的结构。一些热，机械，电气和化学性能以及所获得的缩聚物的分子量已被确定。
The synthesis of a new aliphatic–aromatic polythioesters obtained by polycondensation of 4,5-di(mercaptomethyl)–1,2-dimethylbenzene,4,6-di(mercaptomethyl)–1,3-dimethylbenzene and 2,5-di(mercaptomethyl)–1,4-dimethylbenzene with adipoyl and sebacoyl chloride is described. To define the optimal condition of the process, the polythioester from 2,5-di(mercaptomethyl)–1,4-dimethylbenzene and sebacoyl chloride was chosen as a model system and obtained by interfacial polycondensation as well as by low- and high-temperature solution polycondensation. To determine the optimal conditions for polycondensation the following parameters have been studied: kind of organic solvent, concentration of reagents, temperature and time of reaction and, in the case of interfacial polycondensation additional, ratio of aqueous to organic phase, kind and concentration of hydrochloride acceptor, and kind and concentration of catalyst were taken into consideration. The quality of the obtained polycondensates was estimated on the basis of values of the reduced viscosity and yield. The structure of the aliphatic–aromatic polythioesters was determined from elementary analysis, infrared spectra, and X-ray analysis. Some thermal, mechanical, electrical, and chemical properties as well as molecular weights of obtained polycondensates have been determined.