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首页> 外文期刊>Journal of Applied Polymer Science >Flame Retarding Effect of Graphite in Rotationally Molded Polyethylene/Graphite Composites
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Flame Retarding Effect of Graphite in Rotationally Molded Polyethylene/Graphite Composites

机译：石墨在滚塑聚乙烯/石墨复合材料中的阻燃作用

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摘要

Linear low-density polyethylene (LLDPE) compounds containing 10 wt % graphite fillers were rotationally molded into flat sheets. Flame retardancy was studied using cone calorimeter tests conducted at a radiative heat flux of 35 kW/m(2). Only the expandable graphite, an established flame retardant for polyethylene, significantly reduced the peak heat release rate. Compared with the neat polyethylene, it was easier to ignite the LLDPE composites containing carbon black, expandable graphite, and exfoliated graphite. However, rather unexpectedly, the inclusion of flake graphite increased the time to ignition by up to 80%. Simulations conducted with the ThermaKin numerical pyrolysis software suggest that increased reflectivity was mainly responsible for this effect. (C) 2014 Wiley Periodicals, Inc.
机译：将包含10 wt％石墨填料的线性低密度聚乙烯（LLDPE）化合物旋转成型为平板。使用锥形量热仪在辐射热通量为35 kW / m（2）的条件下研究了阻燃性。只有可膨胀石墨（一种已建立的聚乙烯阻燃剂）才能显着降低峰值放热速率。与纯聚乙烯相比，含碳黑，可膨胀石墨和片状石墨的LLDPE复合材料更容易着火。但是，出乎意料的是，片状石墨的加入使点火时间增加了多达80％。使用ThermaKin数值热解软件进行的模拟表明，反射率的提高是造成这种效应的主要原因。 （C）2014威利期刊公司

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