Precision Polymerization and Polymers I. Polymerizability in Anionic Cyclopolymerization of 1,2:5,6-Dianhydrohexitols.

DOI Web Site 7 References
  • HATAKEYAMA Takeshi
    Division of Molecular chemistry, Graduate School of Engineering, Hokkaido University
  • KAMADA Masatoshi
    Division of Molecular chemistry, Graduate School of Engineering, Hokkaido University
  • SATOH Toshifumi
    Division of Molecular chemistry, Graduate School of Engineering, Hokkaido University
  • YOKOTA Kazuaki
    Division of Molecular chemistry, Graduate School of Engineering, Hokkaido University
  • KAKUCHI Toyoji
    Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University

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Other Title
  • 精密重合・精密合成高分子Ｉ　　１，２：５，６‐ジアンヒドロヘキシトールのアニオン環化重合性
  • 1 2 5 6 ジアンヒドロヘキシトール ノ アニオン カンカ ジュウゴウセイ

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Abstract

In order to clarify the differences of polymerizability among 1, 2: 5, 6-dianhydrohexitols, characteristics of the polymerizations of 1, 2: 5, 6-dianhydro-3, 4-di-O-methyl-D-mannitol (1), -L-iditol (2), and-D-glucitol (3) with potassium tert-butoxide (t-BuOK) were compared. The apparent rate constant of polymerization decreased in the order of 1>3>2. The polymerizations of 2 and 3 showed that chain transfer reactions occurred concurrently. End-functionalization in the polymerization of 1 proceeded in a high efficiency over 95% to yield macromonomers having a styryl group or oxetanyl group at a terminal. The result indicated that the polymerization of 1 proceeded in a living manner. The initiator efficiency in the polymerization of 1 was low (0.55) owing to the poor solubility of t-BuOK. 18-Crown-6 ether (18C6) increased the solubility of t-BuOK by forming a complex. The polymerization of 1 in the presence of 18C6 yielded the polymer with a number-average degree of polymerization (DPn) corresponding to the feed molar ratio of the monomer to the initiator ([M] 0/ [I] 0).

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 54 (10), 710-715, 1997

    The Society of Polymer Science, Japan

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