立体規則性均一構造高分子の構築 Preparation of Stereoregular Uniform Polymer Architectures

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超臨界流体クロマトグラフィーを用いて, 立体特異性リビング重合で合成した末端に官能基を有するイソタクチックならびにシンジオタクチックポリ (メタクリル酸メチル) の均一ポリマーを調製した. 得られた反応性均一ポリマーをビルディングブロックとして, ステレオブロック, ブロック, 星形, 櫛形などの均一高分子構造体を構築し, その物性の評価を行った.

Stereofegular poly (methyl methacrylate) s (PMMAs) having a functional group at their teminating chain-end were prepared by stereospecific living polymerization. The resulting end-functional PMMAs were fractiomted into uniform polymers by means of supercdtical fiuid chromatography (SFC). The uniform PMMAs thus obtained were effectively used as building blocks to construct stereoregular uniform polymer arcllitectures, such as stereoblock, star, and comb-like polymers. Stereoblock PMMA with uniform block lengths (uniform stereoblock PMMA) was prepafed by coupling feaction between isotactic (it-) and syndiotactic (st-) PMMAs having a hydroxyl end group, fbllowed by GPC or SFC separation. The resulting uniform sterooblock PMMA was found on the basis of GPC analysis to form intraand intermolecularly associated stereocomplexes in acetone. Uniform isotactic and syndiotactic three-arm star PMMAs were also prepared by the coupling reaction between PMMA-OHs and 1, 3, 5-benzenetricarbonyl trichloride. Stefeoreg-Ularity of the branches was found to affect the branching effect on the solution viscosity of the star polymers. Polymerizations of uniform st-and it-PMMA macromonomers were carried out with radical and anionic initiators. The products were separated by GPC or SFC into uniform oligo (macromonomer) s, whose solution viscosities clearly showed branching effect. Anionic copolymerization of the uniform macromonomers with DPs of prime numbers (25 and 31) gave the products consisting of copolymer homelogues each of which has a number of monomer units different from the others, and the products could be fractionated into each component by means of SFC. Quantitative analysis of the product distribution by SFC gave information on the reactivities of macromonomers and pfopagating mions.

収録刊行物

  • 高分子論文集

    高分子論文集 54(10), 661-673, 1997-10-25

    The Society of Polymer Science, Japan

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各種コード

  • NII論文ID(NAID)
    10003286931
  • NII書誌ID(NCID)
    AN00085011
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03862186
  • NDL 記事登録ID
    4334402
  • NDL 雑誌分類
    ZP16(科学技術--化学・化学工業--高分子化学・高分子化学工業)
  • NDL 請求記号
    Z17-92
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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