Living Cationic Polymerization of Vinyl Ether with a Lewis Acid/Acetylacetone Initiating System-The Role of Acetylacetone as a Protogen and a Ligand

• KANAOKA Shokyoku

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• NAKAYAMA Shinya

  Department of Macromolecular Science, Graduate School of Science, Osaka University

• AOSHIMA Sadahito

  Department of Macromolecular Science, Graduate School of Science, Osaka University

Bibliographic Information

Other Title

• ルイス酸／アセチルアセトン開始剤系によるビニルエーテルのリビングカチオン重合―アセチルアセトンのプロトン源および配位子としての役割
• Living Cationic Polymerization of Vinyl Ether with a Lewis Acid/Acetylacetone Initiating System—The Role of Acetylacetone as a Protogen and a Ligand

Abstract

The cationic polymerization of isobutyl vinyl ether (IBVE) was examined using various Lewis acids in the presence of an excess of acetylacetone (acac). With EtAlCl₂, TiCl₄, and FeCl₃, almost no polymerization proceeded when the acac concentration was over 0.5 M. In contrast, SnCl₄, ZnCl₂, and GaCl₃ induced polymerization even at a higher acac concentration. Interestingly, SnCl₄ produced polymers with a narrow molecular weight distribution (MWD). In addition, the number-average molecular weight (M_n) of the product polymers increased proportionally to the monomer conversion. It should also be noted that the M_n of the products varied inversely with the amounts of SnCl₄. These results suggested that H⁺, which was generated by the coordination of an acac molecule with SnCl₄, is the real initiator for the polymerization.<br>

Journal

• KOBUNSHI RONBUNSHU

  KOBUNSHI RONBUNSHU 68 (5), 349-351, 2011

  The Society of Polymer Science, Japan

Keywords

• Living Polymerization
• Cationic Polymerization
• Acetylacetone
• Added Base
• Vinyl Ether

Details

• CRID: 1390282681502137600
• NII Article ID: 130004489330
• DOI: 10.1295/koron.68.349
• ISSN: 18815685
• ISSN: 03862186
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed