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Hydrovinylsilanes in sequential reactions: A route to graft copolymers [1]

✍ Scribed by Tomislav M. Stefanac; Michael A. Brook

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
262 KB
Volume
9
Category
Article
ISSN
1042-7163

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✦ Synopsis

The radical copolymerization of styrene or methyl methacrylate and diphenylvinylsilane 1 led to Si-H functionalized polyolefins 5-7 and 8-10, respectively. The efficiency of incorporation of 1 was low. In addition, the molecular weights were inversely proportional to the concentration of 1, indicating that, while the silane behaves as a monomer (Si-CH‫ס‬CH 2 ), its primary role was as a chain termination and a chain transfer (Si-H) agent. The copolymers contained about 1 mol% Si-H groups: the methacrylate derivatives also contained Si-vinyl groups. The residual Si-H groups in the copolymers remained chemically active. It was thus possible to graft vinylsilicones onto 9 using transition metal catalyzed hydrosilation to give 11, or vinylanthracene onto 9 using radically induced hydrosilation to give 12.

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