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D.c. electrical conduction phenomena between two non-contacting stainless steel fibres in a polycarbonate matrix

机译:D.C.聚碳酸酯基质中两种非接触式不锈钢纤维之间的电导现象

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摘要

Model two-fibre devices have been constructed to simulate the local electrical environment between neighbouring fibres in stainless steel fibre polycarbonate composites. The voltagecurrent characteristics of the device have been studied as a function of the shortest distance (gap length) between the fibres, arranged in T-configurations. From the device behaviour it is concluded that to explain the observed levels of resistivity in bulk composites (as low as a few ohms centimetres for 1% volume fraction of metal) gap levels must be 6 Ocm) obtained in the gap between fibres. Furthermore the lowest experimental estimate of the dielectric strength of the polycarbonate in the gaps, exceeds by a factor of ten or more the tabulated value for bulk polycarbonate. In the conclusion some tentative suggestions on the origin of these device ‘size effects’ are presented. This involves consideration of the length and orientation of polymer chains in relation to the gaps and cross-linking effects.
机译:已经构造了两种纤维模型,以模拟不锈钢纤维聚碳酸酯复合材料中相邻纤维之间的局部电气环境。已经研究了该设备的电压电流特性,该特性是按照T形排列的光纤之间最短距离(间隙长度)的函数进行的。从器件的行为可以得出结论,为解释在纤维之间的间隙中获得的块状复合材料中观察到的电阻率水平(对于1%的金属体积分数,低至几欧姆厘米),间隙水平必须为6 Ocm。此外,间隙中聚碳酸酯的介电强度的最低实验估计值超出了散装聚碳酸酯的列表值的十倍或十倍以上。在结论中,提出了有关这些设备“尺寸效应”起源的一些初步建议。这涉及考虑与间隙和交联效果有关的聚合物链的长度和取向。

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