ポリメチルメタクリレート濃厚溶液の非ニュートン流動

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タイトル別名
  • NON-NEWTONIAN FLOW OF CONCENTRATED SOLUTIONS OF POLYMETHYLMETHACRYLATE
  • ポリメチルメタクリレート ノウコウ ヨウエキ ノ ヒニュートン リュウドウ

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抄録

Non-Newtonian flow of concentrated cyclohexanone solutions of five polymethyl methacrylate of different molecular weights have been studied. The dependence of the apparent and zero-shear viscosities on rate of shear, molecular weight and concentration is very similar to that in polyvinyl chloride solutions (see previous paper).<br>The log-log plot of zero-shear viscosity against concentration for polymethyl methacrylate solutions is represented by two straight lines intersecting at one point (critical concentration Cc). The slopes of the lines are 5 above Cc and 3.2 below Cc, respectively. Furthermore, the critical concentration in volume fraction of polymer, V2c, multiplied by the chain length Z is found to range from 70 to 180. The product Ccρ√Z is (ρ: density of solution) is approximately constant and independent of the chain length as ame-as in the previous study on polyvinyl chloride.<br>These results do not follow the Bueche′s Theory. Many experimental results are explained reasonably by using a Equivalent Gel Sphere Model.

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 35 (3), 174-177, 1962

    一般社団法人 日本ゴム協会

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