Precision Polymerization and Polymers II. Living Radical Polymerization with Transition Metal Complexes.

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  • SAWAMOTO Mitsuo
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University
  • KAMIGAITO Masami
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University

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Other Title
  • 精密重合・精密合成高分子　ＩＩ　　遷移金属錯体によるリビングラジカル重合
  • センイ キンゾク サクタイ ニヨル リビング ラジカル ジュウゴウ

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Abstract

This comprehensive article provides a review on the current status of living radical polymerization mediated by transition metal complexes. A general approach to such precision radical polymerization is proposed which is based on dynamic equilibria between growing radicals and covalent dormant species. These living radical polymerizations may be initiated with combinations (initiating systems) of a halogen-containing initiator and a transition metal complex. The initiators include halogenated hydrocarbons, haloketones (CHCl2COPh, etc.), and haloesters (CHCl2CO2CH3, etc.); the transition metal complexes involve such metals as Ru (II), Ni (II), Fe (II), and Cu (I). Sometimes weak Lewis acids such as Al (OiPr) 3 are employed as additives. The living polymerizations are effective for methacrylates, acrylates, and styrene derivatives, and lead to block or random copolymers, end-functionalized polymers, and star polymers of controlled molecular weights and well-defined architectures.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 54 (12), 875-885, 1997

    The Society of Polymer Science, Japan

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