誘電率を用いた混練度判定の可能性

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書誌事項

タイトル別名
  • Possibility of Mixing Level Estimation Using Dielectric Constant.
  • ユウデンリツ オ モチイタ コンレンド ハンテイ ノ カノウセイ

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抄録

The relation between mixing times and dielectric constants of rubber compounds is investigated as a step of the series studies on compound properties vs. mixing. Using an impedance analyser, capacitances are measured with appreciable reproducibility for the compound sheets by a Brabender Plastgraph and a press where the same recipe materials as used in our study of the EPR-processability indices are mixed and pressed. When plotted against mixing times with semilogarithmic expression, the curves of the dielectric constants calculated by the capacitances shows such bending points as in the case of electrical conductivities reported somewhere, whreas the constants at 30s are 2-3 times larger than those at 10min, and steeper decreases until the minimum compounding times are characteristic to the curves in cooperation with the milder changes after the times. It suggests suitability ofthe dielectric measurement for mixing level estimation. The theoretical backborn is not clear. It might be noted that the similar phenomenon are known in W/O emulsions.

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 68 (3), 193-196, 1995

    一般社団法人 日本ゴム協会

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