Ruthenium catalyzed chemical modification of unsaturated polymers |
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Authors: | Hongjie Guo Mark A. Tapsak William P. Weber |
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Affiliation: | (1) D. P. and K. B. Loker Hydrocarbon Research Institute, Derpartment of Chemistry, University of Southern California, 90889-1661 Los Angeles, CA, USA |
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Abstract: | Summary Chemical modification of unsaturated polysiloxanes with pendant or terminal vinyl groups and polycarbosilanes with pendant Si-vinyl groups has been achieved by a novel ruthenium catalyzed reaction. Dihydridocarbonyltris(triphenylphosphine)-ruthenium catalyzes the addition of the ortho C–H bond of 2-methylacetophenone across the C–C double bond of pendant or terminal vinyl groups of polymers such as copoly(dimethylsiloxane/vinylmethylsiloxane), polydimethylsiloxane which is terminated with vinyldimethylsiloxy groups and copoly(vinylmethylsilylene/1,4-phenylene). |
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