Carbon Black Selective Dispersion and Electrical Properties of Epoxy Resin/Polystyrene/Carbon Black Ternary Composites
Carbon Black Selective Dispersion and Electrical Properties of Epoxy Resin/Polystyrene/Carbon Black Ternary Composites
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DOI：
10.4028/www.scientific.net/amr.548.94
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发表时间：
2012-07
期刊：
影响因子：
--
通讯作者：
Chuanguo Ma;Ming Liu
中科院分区：
文献类型：
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作者：
Chuanguo Ma;Ming Liu
本文研究了炭黑（CB）在不相容的热塑性/热固性聚合物（PS/EP）共混物中的选择性分散和导电性能。结果表明，CB粒子在PS/EP共混物中优先分布在EP相中。当PS含量为10 pbw时，共混物呈现EP连续相结构，当PS含量为20 pbw和30 pbw时，共混物呈现双连续相结构。用热力学参数解释了炭黑粒子的选择性分散。共混物的相结构对导电和介电性能有重要影响。含10 pbw PS的共混物具有非常低的逾渗阈值，接近0.25wt%。
Carbon black (CB) selective dispersion and conductive properties of immiscible thermoplastic/thermosetting polymer blends consisting of polystyrene (PS) and epoxy resin (EP) were investigated in this paper. The results showed that CB particles are preferentially localized in EP phase in PS/EP blends. The blend with 10 pbw (parts by weight) PS presented an EP continuous phase structure, and both blends with 20 pbw and 30 pbw developed into a bi-continuous phase structure. The selective dispersion of CB particles was explained by thermodynamic parameters. The phase structures of blends have important influences on both conductive and dielectric properties. The blends with 10 pbw PS has a very low percolation threshold nearly 0.25wt%.