碳基聚丙烯导电复合材料的制备及性能研究  

Study on Properties of Carbon-based Polypropylene Conductive Composites and Its Preparation

作　　者：宋正辉[1,2] 陈世鹏[1,2] 黄超[2] 李亚[2] 姚利辉[2] 邵双喜[2] 段景宽[2] 秦林[1] 

机构地区：[1]太原理工大学,山西太原200111 [2]宁波工程学院材料学院,浙江宁波315016

出　　处：《塑料科技》2015年第6期55-60,共6页Plastics Science and Technology

摘　　要：采用两步分散方法,即依次通过粉体预混和熔融共混两步法制备了碳基聚丙烯(PP)导电复合材料,利用不同的表征手段研究了碳基材料用量对PP复合材料性能的影响。结果表明:片状膨胀石墨(EG)和纤维状多壁碳纳米管(MWCNTs)在PP体系中形成了完整而稳定的导电网络,而且分散均匀,致使PP的拉伸强度和断裂伸长率明显提高,在EG/MWCNTs=0.1:0.1时,复合材料的拉伸强度和断裂伸长率达到最大。复合碳基材料的加入,影响了PP的结晶行为,改善了PP复合材料的耐热性能,显著提高了PP复合材料的导电性能,其逾渗阈值在EG/MWCNTs为0.1:0.1到0.5:0.5之间。Polypropylene（PP） conductive composites based on flake graphite （EG） and multi-walled carbon nanotubes （MWCNTs） were prepared by means of ＂two step＂ method, namely, ＂powder blending＂ and ＂melting blending＂, and the effects of carbon materials content on properties of composites were studied by different characterization methods. The results show that： the complete and stable conductive network is formed in polypropylene matrix, and the conductive network disperses homogeneously in matrix, which results in the obvious improvement of tensile strength and elongation at break of composites. When the content of EG/MWCNTs is 0.1：0.1, the value of tensile strength and elongation at break of composites reach to the maximum. The incorporation of EG and MWCNTs into PP has taken into some effects on the crystal behavior of polypropylene, and improves the thermal and conductive propertie, of composites. The percolation threshold of EG/MWCNTs is between 0.1/0.1 and 0.5/0.5 in composites.

关 键 词：聚丙烯 多壁碳纳米管 石墨 导电性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]