ＧＰＣ‐ＬＡＬＬＳによる高分子のキャラクタリゼーション　ＩＶ　　高圧法ラジカル重合ポリエチレンの分岐構造

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タイトル別名
  • Characterization of polymers by GPC-LALLS. IV. Branching structure of LDPE.
  • コウアツホウ ラジカル ジュウゴウ ポリエチレン ノ ブンキ コウゾウ

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抄録

The b-value of polyethylene (PE) is determined 0.9 by the model PE made by gamma-ray irradiation of a linear PE in accordance with the previously reported method. The above is the monodisperse b-value, which is here distinguished from the polydisperse b-value. The former, relevant to a molecular weight (MW)-monodisperse polymer, is proved significantly less than the latter, relevant to a MW-polydisperse polymer, especially in case of trifunctionally branched polymer. Shultz′s numerical solutions of g′(=_??_η_??_br/_??_η_??_l, the ratio of intrinsic viscosities of branched and linear molecules of equal MW) are based-on for the proof. The branch data for low density PE of high pressure-radical polymerization which appeared in the past literatures are reviewed by referring to this results and the first report of this series.

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 59 (3), 162-168, 1986

    一般社団法人 日本ゴム協会

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