材料科学
复合材料
高密度聚乙烯
热稳定性
碳化钨
钨
聚乙烯
热的
电阻式触摸屏
化学工程
冶金
电气工程
物理
气象学
工程类
作者
Chuanchuan Dai,Yinghao Qi,Jiaqi Gao,Zhaoxin Li,Yu Wu,Xuhuang Chen
出处
期刊:ACS applied electronic materials
[American Chemical Society]
日期:2024-03-26
卷期号:6 (4): 2478-2489
标识
DOI:10.1021/acsaelm.4c00125
摘要
The investigation of cyclic stability holds paramount significance in the realm of conductive polymer composites (CPCs), specifically in applications related to overcurrent protection, self-heating, and sensors. This study employs a melt-blending methodology to synthesize CPCs comprising high-density polyethylene (HDPE) and tungsten carbide (WC), with a focus on identifying the key factors influencing cyclic stability. A comparative analysis is conducted between two triggering mechanisms: external thermal activation and electric heating. The CPCs demonstrate a pronounced positive temperature coefficient (PTC) and exceptional cyclic stability when subjected to external thermal triggering. Subsequent to the electrical triggering of the composite material, the resistance change rate exhibits an increase with a rising impact voltage. Moreover, the rate of resistance variation correlates positively with a reduction in the WC content. Utilizing the dielectrophoresis theory model, this study scrutinizes alterations in the conductive network under an electric field, revealing agglomeration tendencies among particles of the CPCs. Significantly, the introduction of self-cross-linking agents proves effective in mitigating this phenomenon. Consequently, beyond ensuring external thermal cyclic stability, as well as that under electric field conditions, this emerges as a pivotal consideration in the realm of CPCs.
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