Telomerization of functional mercaptans with styrene
Telomerization of functional mercaptans with styrene
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DOI：
10.1016/s0014-3057(98)00147-5
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发表时间：
1999-03-01
影响因子：
6
通讯作者：
Boutevin, B
中科院分区：
文献类型：
--
作者：
Bechkok, A;Belbachir, M;Boutevin, B
研究了苯乙烯与硫醇的调聚反应，以制备不同分子量的功能性调聚物和大分子单体的前体。研究表明，在正常条件下，该反应得到了高分子量的聚合物和苯乙烯与苯乙烯的单加合物的混合物。动力学研究允许通过各种方法测定的转移常数，其值为7巯基乙酸和12 C6 F 13 C2 H4 SH。这些非常高的值解释了调聚体的不合时宜的终止，导致聚合物的形成。对于所有带有给电子基团的单体，在硫醇中观察到这种区别性特征，并且可以通过Alfrey和Price Q-e体系来解释。(C)1998爱思唯尔科技有限公司版权所有。
The telomerization of styrene with mercaptans was studied in order to prepare functional telomers with variable molecular weights, precursors of macromonomers. The study has shown that, under normal conditions, the reaction gives a mixture of polymers with high molecular weights and monoadduct of styrene and mercaptan.The kinetic study allowed the determination of transfer constants through various methods, their values being 7 for thioglycolic acid and 12 for C6F13C2H4SH. These very high values explain an untimely disparition of the telogen leading to the formation of polymers in a. second step.This distinctive feature is observed with mercaptans for all monomers bearing electron donating groups and may be explained by the Alfrey and Price Q-e system. (C) 1998 Elsevier Science Ltd. All rights reserved.