The Additive Effect of Triphenylphosphine on the Polymerization of Vinyl Monomers by Copper(II) Chelates
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概要
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Various copper(II) chelates were found to be effective initiators in the polymerization reaction of the methyl methacrylate in the presence of triphenylphosphine. The conversion increases with an increase in the concentration of triphenylphosphine, reaching a constant level at the ratio of 1: 2 between copper chelates and triphenylphosphine. Di-μ-methoxo-bis(ethylacetoacetato)dicopper(II) was the most effective initiator. The dependence of the rate of the polymerization on the square root of the concentration of the complexes suggests that the polymerization by this initiation system proceeds <I>via</I> a radical mechanism. It can be assumed that the copper chelate coordinated the triphenylphosphine and that homolytic fission occurred to give a free ligand radical, accompanied by the reduction of the central copper atom. Stable copper (I) mixed chelates were obtained under conditions similar to those of the polymerization.
- 公益社団法人 日本化学会の論文
著者
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Shono Toshiyuki
Department Of Applied Chemistry Faculty Of Engineering Osaka Institute Of Technology
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Shinra Koichiro
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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Yamashoji Yuko
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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