Abstract
Polymerizations to give polymers with relatively high number average molecular weight (>Mn=10000) are demonstrated for styrene, α-methylstyrene, 4-methylstyrene, 4-methoxystyrene, and 4-chloromethylstyrene by the combination of platinum(0) 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex [Pt(0)(DVTMDS)2] (0.1 mol%) and methyldichlorosilane (10 mol%) in CH2Cl2. Poly(4-chloromethylstyrene) obtained by this polymerization system has linear structure as elucidated by 1H NMR, although chain transfer is noticed in the polymerization. When the polymerization of ethyl vinyl ether was quenched with methanol followed by the treatment with 0.1N HCl, the resulting polymer showed a resonance at 9.76 ppm in 1H NMR arising from an aldehyde group. This result provides a strong evidence for the relevance of a carbocationic polymerization mechanism.
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Oishi, M., Kawakami, Y. A Novel Catalyst System for Cationic Polymerization of Styrene Derivatives. Combination of Platinum(0) Complex and Methyldichlorosilane. Polym J 33, 765–772 (2001). https://doi.org/10.1295/polymj.33.765
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DOI: https://doi.org/10.1295/polymj.33.765