hydrosilylation

This paper considers the synthesis and investigation of cyclic silicon-organic polymers with mono- and polycyclic fragments in the side chain. For obtaining monocyclic polymers, the hydrosilylation reaction of 1-hydro-3-vinylhexamethylcyclotetrasiloxane was used. The reaction was conducted in a $\mathrm{CCl}_4$ solution at 75°C in the presence of Speier’s catalyst $\left(\mathrm{H}_2 \mathrm{PtCl}_6 \cdot 6 \mathrm{H}_2 \mathrm{O}\right)$ to produce a viscous-flow at room temperature polymer. The polymers were studied by NMR spectroscopy.

Hydrosilylation reactions of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetrasiloxane (D₄^H) with 2,2,3,3,4,4,5,5-octafluoropentyl acrylate at 1:4.2 ratio of initial compounds catalysed by platinum catalysts have been studied and corresponding adduct D₄^R' has been obtained. Ring opening polymerization of D₄^R in the presence of dry potassium hydroxide has been carried out and comb-type polymers with 2,2,3,3,4,4,5,5-octafluoropentyl propionate side groups have been obtained.