Simultaneous electrical and rheological measurements on melts of conductive polymer composites under elongation
Simultaneous electrical and rheological measurements on melts of conductive polymer composites under elongation
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DOI：
10.1016/j.polymer.2014.09.028
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发表时间：
2014-10
期刊：
影响因子：
4.6
通讯作者：
Z. Starý
中科院分区：
文献类型：
--
作者：
Z. Starý
导电聚合物复合材料在变形过程中的结构发展是一个非常有趣的话题，因为导电粒子路径的结构决定了复合材料的电学性能。本文首次介绍了利用改进的<s:1>恩斯特拉伸流变仪同时测量拉伸率的电气和流变学方法。这样的实验有助于理解导电聚合物复合材料的加工与性能之间的关系。第一个结果是在含4.0%炭黑的聚苯乙烯上，在150℃的温度下得到的。与剪切相似，在拉伸下电导率的发展是由流动引起的破坏和颗粒结构的形成的竞争所决定的，并且受到施加的应变速率的很大影响。
The structure development in conductive polymer composites during deformation is a topic of great interest as the structure of conductive particle pathways governs electrical properties of the composite. In this paper simultaneous electrical and rheological measurements in elongation are introduced for the first time using a modified Münstedt tensile rheometer. Such kind of experiment can help in understanding the relationships between processing and properties of conductive polymer composites. The first results presented were obtained on polystyrene containing 4 vol.% of carbon black at the temperature of 150 °C. Similar to the shear, the conductivity development under elongation is given by a competition of flow-induced destruction and build-up of particle structures and it is considerably influenced by the strain rate applied.