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首页> 外文期刊>Journal of Applied Polymer Science >Electrical properties and morphology of polypropylene/epoxy/glass fiber composites filled with carbon black
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Electrical properties and morphology of polypropylene/epoxy/glass fiber composites filled with carbon black

机译：填充炭黑的聚丙烯/环氧树脂/玻璃纤维复合材料的电学性质和形态

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摘要

The volume resistivity and percolation thresholds of carbon black (CB) filled polypropylene (PP), PP/epoxy, and PP/epoxy/glass fiber (GF) composites were measured. The morphology of these conductive polymer composites was studied with scanning electron microscopy (SEM). The effects of the GF and epoxy contents on the volume resistivity were also investigated. The PP/epoxy/GF/CB composite exhibited a reduced percolation threshold, in comparison with that of the PP/CB and PP/epoxy/CB composites. At a given CB content, the PP/epoxy/GF/CB composite had a lower volume resistivity than the PP/CB and PP/epoxy/CB composites. SEM micrographs showed that CB aggregates formed chainlike structures and dispersed homogeneously within the PP matrix. The addition of the epoxy resin to PP resulted in the preferential location of CB in epoxy, whereas in the PP/epoxy/GF multiphase blends, because of the good affinity of CB to epoxy and of epoxy to GF, CB particles were located in the epoxy phase coated on GF. The decreased percolation threshold and volume resistivity indicated that conductive paths existed in the PP/epoxy/GF/CB composite. The conductive paths were probably formed through the interconnection of GF. Appropriate amounts of GF and epoxy should be used to decrease the volume resistivity and provide sufficient epoxy coating. (c) 2005 Wiley Periodicals, Inc.
机译：测量了炭黑（CB）填充的聚丙烯（PP），PP /环氧树脂和PP /环氧/玻璃纤维（GF）复合材料的体积电阻率和渗透阈值。用扫描电子显微镜（SEM）研究了这些导电聚合物复合材料的形态。还研究了GF和环氧含量对体积电阻率的影响。与PP / CB和PP /环氧/ CB复合材料相比，PP /环氧/ GF / CB复合材料的渗滤阈值降低。在给定的CB含量下，PP /环氧树脂/ GF / CB复合材料的体积电阻率低于PP / CB和PP /环氧树脂/ CB复合材料的体积电阻率。 SEM显微照片表明，CB聚集体形成链状结构并均匀地分散在PP基质中。在PP中添加环氧树脂会导致CB在环氧树脂中的优先位置，而在PP /环氧/ GF多相共混物中，由于CB对环氧树脂具有良好的亲和力，而环氧树脂与GF具有良好的亲和力，因此CB颗粒位于树脂中。环氧相涂在GF上。降低的渗透阈值和体积电阻率表明，PP /环氧树脂/ GF / CB复合材料中存在导电路径。导电路径可能是通过GF的互连形成的。应使用适量的GF和环氧树脂以降低体积电阻率并提供足够的环氧涂层。 （c）2005年Wiley Periodicals，Inc.

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