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Segregated conductive polymer composite with synergistically electrical and mechanical properties
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2017-11-13 , DOI: 10.1016/j.compositesa.2017.11.008
Wei Zhai , Shuaiguo Zhao , Yan Wang , Guoqiang Zheng , Kun Dai , Chuntai Liu , Changyu Shen

The potential of segregated conductive polymer composites is greatly hampered due to its poor mechanical strength and brittle nature. In this work, plunger type injection molding (PTIM) is developed to achieve synergistically electrical and mechanical properties on carbon nanotubes (CNTs)/polypropylene (PP)/ultra-high molecular weight polyethylene (UHMWPE) segregated conductive polymer composite. Morphology observation indicates that the segregated CNTs conductive network was formed along the interfaces between PP and UHMWPE grains. An ultralow percolation threshold of 0.13 vol% is achieved, which is much lower than that of conventional injection molding. The strength of PTIM sample is improved; importantly, more than 10 times of improvement in elongation at break has been achieved compared to the sample obtained from frequently-used compression molding. Stability of the segregated conductive network was evaluated through dynamic strain-sensing behaviors. This paper presents a meaningful strategy towards the improvement of comprehensive performance of segregated conductive polymer composite.



中文翻译:

具有协同的电气和机械性能的隔离型导电聚合物复合材料

由于其差的机械强度和脆性,极大地阻碍了隔离的导电聚合物复合材料的潜力。在这项工作中,开发了柱塞型注塑成型(PTIM),以在碳纳米管(CNT)/聚丙烯(PP)/超高分子量聚乙烯(UHMWPE)分离的导电聚合物复合材料上实现协同的电气和机械性能。形态学观察表明,沿PP和UHMWPE晶粒之间的界面形成了分离的CNTs导电网络。达到了0.13 vol%的超低渗漏阈值,远低于常规注塑成型的渗漏阈值。提高了PTIM样品的强度;重要的,与从常用压缩成型获得的样品相比,断裂伸长率提高了10倍以上。通过动态应变感应行为评估了隔离的导电网络的稳定性。本文提出了一种有意义的策略,可改善隔离型导电聚合物复合材料的综合性能。

更新日期:2017-11-13
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