せん断流動下でのエポキシ樹脂の導電性挙動に及ぼす充填材の影響

概要

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The volume resistivity of conductive filler filled epoxy resin was measured under shear flow. A rheometer with double-cylinder type sample cell was employed in order to measure the volume resistivity and shear stress under shear flow. The outer and inner cylinders of the rheometer were used as the electrodes. Nickel particles and two kinds of carbon-fibers with different aspect ratios were used as the conductive fillers for the samples. It was found that the volume resistivity was affected by shear rate and the volume content and shape of fillers. The shear rate was varied from 10^<-2> to 10^2 sec^<-1>. The minimum volume resistivity was observed for the fiber filled samples in a range of shear rate from to 10 sec^<-1>. The minimum volume resistivity indicated by shear rate for these samples changed when the aspect ratio and volume content of fibers were varied. The volume resistivity of the particle filled samples monotoneously decreased with increasing shear rate. The almost same volume resistivity for the fiber filled samples was observed at the same shear stress, even though the aspect ratio and content of fibers were varied. At the same time, the particle filled samples showed the same tendency in relationship between shear stress and volume resistivity
社団法人日本材料学会の論文
1998-01-15