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Epoxy resin/polyetherimide/carbon black conductive polymer composites with a double percolation structure by reaction-induced phase separation

机译:通过反应诱导相分离具有双重渗透结构的环氧树脂/聚醚酰亚胺/炭黑导电聚合物复合材料

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摘要

A novel double-percolation structural conductive polymer composite based on epoxy/polyetherimide/carbon black was prepared for the first time. The electrical property, phase structure of the composite and the selective distribution of carbon black were investigated. The results show that a reaction-induced phase separation between epoxy and polyetherimide can be observed in epoxy/polyetherimide/carbon black composites. In the blend with 16 wt% polyetherimide, polyetherimide phase changes from a dispersed phase to a three-dimensionally continuous phase, while epoxy converts to a globular dispersed phase. The selective distribution of carbon black in the blends is that almost all carbon black particles are located in polyetherimide phase. Accordingly, a double-percolation structure is formed when carbon black content comes to the percolation threshold in polyetherimide phase. In fact, the percolation threshold of carbon black reduces to 0.5 wt% in the blend with 16 wt% polyetherimide.
机译:首次制备了基于环氧树脂/聚醚酰亚胺/炭黑的新型双渗结构导电聚合物复合材料。研究了复合材料的电性能,相结构和炭黑的选择性分布。结果表明,在环氧树脂/聚醚酰亚胺/炭黑复合材料中,可以观察到反应引起的环氧树脂和聚醚酰亚胺之间的相分离。在具有16重量%的聚醚酰亚胺的共混物中,聚醚酰亚胺相从分散相变为三维连续相,而环氧转化为球状分散相。炭黑在共混物中的选择性分布是几乎所有炭黑颗粒都位于聚醚酰亚胺相中。因此,当炭黑含量达到聚醚酰亚胺相中的渗滤阈值时,形成双重渗滤结构。实际上,在与16重量%的聚醚酰亚胺的共混物中,炭黑的渗透阈值降低到0.5重量%。

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