ムーニー指度の時間依存性

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書誌事項

タイトル別名
  • MECHANICAL BEHAVIOR OF RAW RUBBER IN MOONEY VISCOMETER
  • ムーニー シド ノ ジカン イソンセイ
  • PART I. TIME DEPENDENCE OF MECHANICAL DATA

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Time dependent mechanical data were obtained for different kinds of raw rubber, both synthetic and natural, by using a conventional Mooney Viscometer at a fixed temperature of 100°C. For the data obtained by rotating the rotor at a constant rate of rotation, it was found that the shearing stress in Mooney Unit, ML, could be expressed approximately by the equation;<br>ML=ML0e-t/τ+ML∞, <br>irrespective of the species of rubber. Here ML0, ML∞, and τ are constants independent of time t. Stress-relaxation following a sudden cessation of the rotation of the rotor at any given rotation period appeared in all cases to be linear with a slope of -1/2 in the shorter time region on a log-log graph. For this region we have<br>ML*=AL•t*-1/2.<br>Here the asterisk specifies those obtained in the stress-relaxation experiment. AL is a constant independent of time t*. It approaches a constant value, AL∞, when the rotation period is long enough so that a stationary state is reached in the constant rate of rotation experiment.<br>The dependence of the value of AL on the previous rotation period of the rotor could be written in the form, <br>(ML-ML∞)/(AL-AL∞)/AL∞=XL, <br>where XL is a proportionality constant which is independent both of t and t*.

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 34 (11), 900-908, 1961

    一般社団法人 日本ゴム協会

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