Citation: Xiao Yun Fu, Zheng Ping Fang, Hai Tang Yang, Li Fang Tong. Synthesis and hydrosilation of multi-vinyl branched siloxane for self-healing system[J]. Chinese Chemical Letters, ;2008, 19(6): 655-657. doi: 10.1016/j.cclet.2008.04.015 shu

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

a Institute of Polymer Composites, Zhejiang University, Hangzhou 310027, China;
b Key Laboratory of Macromolecular Synthesis and Functionalization (Zhejiang University),Ministry of Education, Hangzhou 310027, China

Received Date: 17 December 2007

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

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.
- Ring-opening,
- Hydrogenation,
- Hydrosilylation,
- Vinylmethydichlorosilane,
- 1,3,5,7-Tetravinyl-1,3,5,7-tetxamethyl-cyelotetrasiloxane
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