Hydrosilylation and dehydrocondensation reactions of methylhydridesiloxane to acrylic and methacrylic acids |
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| Authors: | O. Mukbaniani G. Zaikov N. Pirckheliani T. Tatrishvili S. Meladze Z. Pachulia M. Labartkava |
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| Affiliation: | 1. I. Javakhishvili Tbilisi State University, I. Chavchavadze Avenue 1, Tbilisi, Georgia 0128;2. Sukhumi State University, Tbilisi State University, Djikia Street 12, Tbilisi, Georgia 0187;3. Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin Street, Moscow, Russia 119991 |
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| Abstract: | The hydrosilylation of α,ω‐bis(trimethylsiloxy) methylhydridesiloxane (degree of polymerization ≈ 53) with acrylic and methacrylic acid with various ratios of the initial compounds, in the presence of platinum hydrochloric acid, has been investigated. In the presence of platinum hydrochloric acid, competitive dehydrocondensation reactions take place with the formation of various oligomers with various chemical links. In the later stages of the reaction, three‐dimensional systems have been obtained. During dehydrocondensation, the reaction order, reaction rate constants, and activation energy have been determined. The structures of the synthesized oligomers have been determined with IR and NMR spectroscopy data. Gel permeation chromatography, differential scanning calorimetry, and X‐ray analyses of the synthesized oligomers have been carried out. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3243–3252, 2007 |
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| Keywords: | kinetics (polym.) oligomers polysiloxanes |
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