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首页> 外文期刊>Journal of Applied Polymer Science >Electrical and thermal phenomena in low-density polyethylene/carbon black composites near the percolation threshold
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Electrical and thermal phenomena in low-density polyethylene/carbon black composites near the percolation threshold

机译：在近渗透阈值附近的低密度聚乙烯/炭黑复合材料中的电气和热现象

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Low-density polyethylene (LDPE)/carbon black (CB) composites were fabricated via melt-compounding technique. The percolation threshold was found to be around 20 wt % CB, and an electrical network formed by conductive CB was proven by scanning electron microscopy investigation. Dielectric responses depicted an interfacial relaxation peak at 20 wt % CB content. LDPE/CB composites showed an electric field-dependent conductivity as and a hysteresis behavior around the percolation threshold region. The CB particles with high thermal conductivity increased the heat conductance of the LDPE/CB20 up to 56%. The dynamic mechanical analysis of the LDPE/CB composites exhibited a noticeable contribution of CB throughout the composites, increasing the storage and loss modulus. The physical interactions between CB particles in the filler network enhanced the thermal degradation of the LDPE/CB25 composite for more than 76 degrees C. The maximum breakdown strength of the LDPE/CB composites appeared with an approximately 10% improvement for LDPE/CB5 than pure LDPE. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47043.
机译：通过熔融配合技术制造低密度聚乙烯（LDPE）/炭黑（CB）复合材料。发现渗透阈值约为20wt％Cb，通过扫描电子显微镜调查证明由导电CB形成的电网。介电响应描绘了20wt％CB含量的界面松弛峰。 LDPE / CB复合材料显示出电场依赖性电导率和围绕渗透阈值区域的滞后行为。具有高导热率的CB颗粒增加了LDPE / CB20的热传导高达56％。 LDPE / CB复合材料的动态力学分析在整个复合材料中表现出Cb的明显贡献，增加了储存和损耗模量。填料网络中CB颗粒之间的物理相互作用增强了LDPE / CB25复合材料的热劣化超过76℃。LDPE / Cb复合材料的最大击穿强度出现了LDPE / CB5的大约10％的改善而不是纯度LDPE。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47043。

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