Hydrosilylation and dehydrocondensation reactions of methylhydridesiloxane to acrylic and methacrylic acids.

Autor: O. Mukbaniani, G. Zaikov, N. Pirckheliani, T. Tatrishvili, S. Meladze, Z. Pachulia, M. Labartkava
Předmět:
Zdroj: Journal of Applied Polymer Science; Mar2007, Vol. 103 Issue 5, p3243-3252, 10p
Abstrakt: 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 [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index