NON-NEWTONIAN FLOW OF CONCENTRATED SOLUTIONS OF POLYMETHYLMETHACRYLATE

DOI Web Site
  • Asai H.
    Central Laboratory, The Japanese Geon Co.

Bibliographic Information

Other Title
  • 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
  • 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

Search this article

Abstract

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.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 35 (3), 174-177, 1962

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

Details 詳細情報について

Report a problem

Back to top