Abstract
Polymerizations to give polymers with relatively high number average molecular weight (> M n = 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 CH 2 Cl 2 . Poly(4-chloromethylstyrene) obtained by this polymerization system has linear structure as elucidated by 1 H 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 HCI, the resulting polymer showed a resonance at 9.76 ppm in 1 H NMR arising from an aldehyde group. This result provides a strong evidence for the relevance of a carbocationic polymerization mechanism.
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