Rheology and conductivity of carbon fibre composites with defined fibre lengths
Rheology and conductivity of carbon fibre composites with defined fibre lengths
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DOI：
10.1016/j.compscitech.2013.06.006
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发表时间：
2013-08-21
影响因子：
9.1
通讯作者：
Schubert, Dirk W.
中科院分区：
文献类型：
--
作者：
Stary, Zdenek;Krueckel, Johannes;Schubert, Dirk W.
含导电填料的聚合物复合材料的流变性能和电性能不仅受填料总含量的影响，而且受填料颗粒形状和尺寸的影响。然而，这两种效应的单独处理在通过熔融混合制备的复合材料中通常是不可行的，因为填料浓度影响熔体的流动行为，因此对最终颗粒几何形状有影响。在这项工作中，复合材料与聚甲基丙烯酸甲酯基体和短的碳纤维与定义的长度独立于纤维浓度的制备和它们的流变性和导电性进行了研究。证实了纤维长度对复合材料的流变学和电性能的显著影响。随着纤维长度的增加，流变量的变化更为显著，同时渗流阈值向纤维体积分数较低的方向移动。(C)2013爱思唯尔有限公司保留所有权利。
Rheological and electrical properties of polymer composites containing conductive fillers are influenced not only by the total content of the filler but also by the shape and dimensions of filler particles markedly. However, separate treatment of these two effects is often not feasible in composites prepared by melt mixing as the filler concentration affects the flow behaviour of the melt and, thus, has an effect on the final particles geometry. In this work, composites with polymethylmethacrylate matrix and short carbon fibres with defined lengths independent on the fibre concentration were prepared and their rheology and the electrical conductivity were investigated. A pronounced influence of the fibre length on the rheological and electrical properties of the composites was confirmed. Increasing the length of the fibres the rheological quantities were affected more significantly and simultaneously the percolation threshold was shifted to lower fibre volume fractions. (C) 2013 Elsevier Ltd. All rights reserved.