Synthesis and hydrosilation of multi-vinyl branched siloxane for self-healing system  

作　　者：Xiao Yun Fu Zheng Ping Fang Hai Tang Yang Li Fang Tong 

机构地区：[1]lnstitute of Polymer Composites, Zhejiang University, Hangzhou 310027, China [2]Key Laboratory of Macromolecular Synthesis and Functionalization （Zhejiang University）, Ministry of Education, Hangzhou 310027, China

出　　处：《Chinese Chemical Letters》2008年第6期655-657,共3页中国化学快报（英文版）

基　　金：Financial support from National Natural Science Foundation of China （No. 50473036） is gratefully acknowledged.

摘　　要：In this work, the preparation of α,ω-dichloride-terminated multi-vinyl branched siloxane 1 （yield： 57.1%） used for self-healing polymer composites were synthesized via ring-opening of 1,3,5,7-tetravinyl-1,3,5,7-tetramethyl-cyclotetrasiloxane （D4^vi） in the presence of vinylmethydichlorosilane （VM-32）. 1 was hydrogenated by aluminum lithium hydride （LiAlH4） to get self-healing monomer 2 （yield： 79.8%） which contained both Si-H bonds and Si-vinyl bonds. Then hydrosilation occurred between these two bands and finally silicone 3 was obtained, showing the potential of self-healing.In this work, the preparation of α,ω-dichloride-terminated multi-vinyl branched siloxane 1 （yield： 57.1%） used for self-healing polymer composites were synthesized via ring-opening of 1,3,5,7-tetravinyl-1,3,5,7-tetramethyl-cyclotetrasiloxane （D4^vi） in the presence of vinylmethydichlorosilane （VM-32）. 1 was hydrogenated by aluminum lithium hydride （LiAlH4） to get self-healing monomer 2 （yield： 79.8%） which contained both Si-H bonds and Si-vinyl bonds. Then hydrosilation occurred between these two bands and finally silicone 3 was obtained, showing the potential of self-healing.

关 键 词：RING-OPENING Hydrogenation HYDROSILYLATION Vinylmethydichlorosilane 1 3 5 7-Tetravinyl-1 3 5 7-tetramethyl-cyclotetrasiloxane 

分 类 号：O63[理学—高分子化学]