华东理工大学学报（自然科学版）2017，Vol.43Issue(5)：606-613,8.DOI:10.14135/j.cnki.1006-3080.2017.05.002
聚丙烯/碳纳米管复合材料的结构与导电性能:注塑工艺与膨胀石墨的影响
Structure and Electric Conductivity of Polypropylene/Carbon Nanotubes Composites:Effect of Injection Process and Expanded Graphite
摘要
Abstract
Distribution and orientation of carbon nanotubes are key parameters to achieve high performance of MWCNT reinforced polymer composites.Under the traditional injection process,surface resistivity of injection molding samples is far higher than that prepared by compression molding,because MWCNT is prone to orient along the direction of flow.In this paper,by adjusting the injection molding process to change the shear field,the distribution and orientation of MWCNT in the matrix were controlled.At a low melt temperature and high injection velocity,carbon nanotubes were locally oriented in the flow direction,which reduced the conductivity.However,at higher melt temperature and lower injection speed,fine conductive network was formed with well dispersion of MWCNT,which effectively improved the conductivity of PP/MWCNT injection samples to reduce the surface resistivity by 5 orders of magnitude.Addition of the expanded graphite,led to enhance and improve the conductive network and thus to increase the electrical conductivity of PP/MWCNT/EG composites,especially at low melt temperature and high injection velocity.With the increase of expanded graphite content,surface resistivity of the composite decreased by 3 orders of magnitude.关键词
注塑成型/聚丙烯/碳纳米管/膨胀石墨/纳米复合材料Key words
injection molding/polypropylene/carbon nanotube/expanded graphite/nanocomposite分类
通用工业技术引用本文复制引用
叶靖,方建鹏,张玲,李春忠..聚丙烯/碳纳米管复合材料的结构与导电性能:注塑工艺与膨胀石墨的影响[J].华东理工大学学报（自然科学版）,2017,43(5):606-613,8.基金项目
国家自然科学基金(91534202,51673063) （91534202,51673063）
上海市基础研究重点项目(15JC1401300) （15JC1401300）
上海市社会发展项目(17DZ1200900) （17DZ1200900）
上海市教育委员会科研创新计划项目 （）
中央高校基本科研业务费专项资金(222201718002) （222201718002）
