Ring-Opening Polymerization of .EPSILON.-Caprolactone Catalyzed by Rare-Earth Lewis Acid or Perfluoroalkanesulfonimides

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  • OSHIMURA Miyuki
    Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology
  • TAKASU Akinori
    Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology

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Other Title
  • 希土類ルイス酸またはパーフルオロアルカンスルホンイミドを触媒に用いたε‐カプロラクトンの開環重合
  • 希土類ルイス酸またはパーフルオロアルカンスルホンイミドを触媒に用いたε-カプロラクトンの開環重合
  • キドルイ ルイスサン マタワ パーフルオロアルカンスルホンイミド オ ショクバイ ニ モチイタ イプシロン カプロラクトン ノ カイカン ジュウゴウ
  • Ring-Opening Polymerization of ε-Caprolactone Catalyzed by Rare-Earth Lewis Acid or Perfluoroalkanesulfonimides

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Description

Ring opening polymerization (ROP) of ε-caprolactone catalyzed by polymer-supported scandium trifluoromethanesulfonate (PS-Sc), scandium perfluoroalkanesulfonates, scandium perfluoroalkanesulfonimides, and perfluoroalkanesulfonimides were performed at moderate temperatures (25-60°C). In these systems, it is possible to synthesize poly(ε-caprolactone) with low polydispersity. After polymerization, PS-Sc was easily recovered quantitatively by simple filtration. Scandium perfluoroalkanesulfonimides and perfluoroalkanesulfonimides were easily recovered by simple filtration or extraction with water from the toluene or chloroform solutions, and could be reused. To investigate the reaction kinetics of these catalysts, the Arrhenius equation and the Eyring equation were used. The ranked values of the energy of activation for all reactions paralleled those of the rate constants. Here, we developed an environmentally benign new catalytic system for ROP of ε-caprolactone, especially in respect to easy recovery of catalysts and decreasing of the catalyst amount.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 68 (5), 257-270, 2011

    The Society of Polymer Science, Japan

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