マクロアゾ開始剤によるポリビニルピロリドン‐ポリスチレンブロック共重合体の合成

DOI

書誌事項

タイトル別名
  • Synthesis of Poly(vinylpyrrolidone)-Polystyrene Block Copolymers by the Use of a Macro-Azo-Initiator.

抄録

A macro-azo-initiator (MAI) was prepared from 4, 4′-azobis (4-cyanopentanoyl chloride) and 1, 6-hexanediol, and two-step radical block copolymerization was carried out with MAI. Vinylpyrrolidone was first polymerized, and then styrene was polymerized to synthesize poly (vinylpyrrolidone) -polystyrene block copolymers. The poly (vinylpyrrolidone) content (X) in the block copolymer was determined by NMR and it ranged from 8.2% to 16.0% depending on the feed conditions. Relationship between monomer consumption of the 2nd step polymerization and [-N=N-] 0.50 [St] 1.20, and relationship between (100/X-1) and [St] 1.20/ [-N=N-] 0.50 showed linearity. The block efficiency was about 80%, except for the case of [St] 0<3.0mol/l. The molecular weights of the block copolymers, Mn=100100-162000 and Mw=189300-395000, were both proportional to [St] 0.80/-[N=N-] 0.50. The values of the intercept agreed with Mn and Mw of poly (vinylpyrrolidone) having azo groups, suggesting that the structure of the block copolymers may be an - (AB) n- or ABA type.

収録刊行物

  • 高分子論文集

    高分子論文集 51 (7), 453-458, 1994

    公益社団法人 高分子学会

キーワード

詳細情報 詳細情報について

  • CRID
    1390282681498854144
  • NII論文ID
    130004035004
  • DOI
    10.1295/koron.51.453
  • ISSN
    18815685
    03862186
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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