剪断流動下での炭素繊維分散シリコンオイルの導電性挙動 : 平行円盤型電極の場合

抄録

Volume resistivity of carbon-fiber-filled silicone oil was measured under shear flow. A rheometer with parallel-plate-type sample cell was employed to measure the volume resistively, where both upper and lower parallel plates were used as electrodes. The effects of shear rate, volume fraction of fibers, and distance between electrodes on volume resistivity were investigated. The critical values for a sudden increase in volume resistivity were found for these three factors. These experimental results were interpreted on the basis of a quantitative model for the formation and destruction of an electric circuit by fibers or the interaction and orientation of fibers. A new method of measuring volume resistivity was found to be effective for inspection of distribution and orientation of fibers in the matrix for conductive-fiber-filled insulating matrix composite materials.