Polymerization of substituted olefins initiated by organometallic compounds of titanium (IV)—II. Evidence for a predominant radical process with methyltitanium derivatives |
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| Authors: | C Blandy D Gervais JP Vairon |
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| Institution: | 1. Laboratoire de Chimie de Coordination du CNRS, associé à l''Université Paul Sabatier, 205, route de Narbonne, 31400 Toulouse France;2. Laboratoire de Chimie Macromoléculaire, associé au CNRS, Université Pierre et Marie Curie, 4, place Jussieu, 75230 Paris Cedex 05, France |
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| Abstract: | Polymerizations of methyl methacrylate (MMA), vinyl acetate, acrylonitrile or styrene (St) initiated by methyl derivatives of Ti(IV) are consistent with a radical process. This conclusion is supported by tacticities of the resulting polymers which are close to those for conventional radical samples and show that propagation obeys a Bernoullian statistics. The major evidence is provided by statistical MMA-St copolymerization which clearly exhibits radical reactivity ratios. |
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