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首页> 外文期刊>Journal of Applied Polymer Science >Enhanced positive temperature coefficient in amorphous PS/CSPE-MWCNT composites with low percolation threshold
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Enhanced positive temperature coefficient in amorphous PS/CSPE-MWCNT composites with low percolation threshold

机译：具有低渗透阈值的无定形PS / CSPE-MWCNT复合材料中增强的正温度系数

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In this work, amorphous polystyrene/chlorosulfonated polyethylene composites doped with multiwalled carbon nanotubes (PS/CSPE-MWCNT) were constructed by in situ polymerization to form semi-interpenetrating networks. The MWCNTs showed excellent dispersion and selective location in the PS regions. High electrical conductivity and low percolation threshold (0.89 wt %) for the composites were achieved. An enhanced positive temperature coefficient (PTC) behavior for amorphous PS/CSPE-MWCNT composites was first reported, nearly without a negative temperature coefficient (NTC) effect when the conductive fillers were beyond the percolation threshold, similar to those of crystalline polymer composites. Moreover, a PTC intensity of more than five orders of magnitude and excellent repeatability of the PTC effect were achieved. This study offers new insight into the development of novel PTC materials with low percolation threshold. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47053.
机译：在该作品中，通过原位聚合构建掺杂有多壁碳纳米管（PS / CSPE-MWCNT）的无定形聚苯乙烯/氯磺化聚乙烯复合材料以形成半互穿网络。 MWCNT在PS区域中显示出优异的分散和选择性位置。实现了复合材料的高电导率和低渗透阈值（0.89wt％）。首先报道，当导电填料超出渗透阈值的情况下，首先报告用于无定形PS / CSPE-MWCNT复合材料的增强的正温度系数（PTC）行为，几乎没有负温度系数（NTC）效应，类似于晶体聚合物复合材料的渗透阈值。此外，实现了超过五个数量级的PTC强度和PTC效应的优异可重复性。本研究提供了新的洞察新的PTC材料，具有低渗透阈值。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47053。

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