聚苯乙烯/多壁碳纳米管复合丝的制备与性能  

Preparation and Characterization of Polystyrene/Multiwalled Carbon Nanotube Composite Fibers

作　　者：杨波[1] 钟华[1] 韩尚君[1] 刘旭东[1] 余斌[1] 周秀文[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《高分子材料科学与工程》2012年第11期137-140,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(10635050)

摘　　要：采用微型双螺杆挤出共混和熔融纺丝法制备了聚苯乙烯/多壁碳纳米管(PS/MWNTs)复合丝。通过添加改性剂可以提高复合材料的纺丝最大拉伸比。光学显微镜和扫描电镜观察发现,当MWNTs含量较小(<2%)时,MWNTs在基体中的分散比较均匀。随着MWNTs含量的增加,团聚增多,且大多数MWNTs沿纤维轴向取向排列。当MWNTs含量较小时,添加一定量改性剂可以提高复合丝的拉伸强度及尺寸稳定性。电性能结果表明,复合丝的导电渗流阈值出现在2%～5%之间。复合材料的流变渗流阈值与导电渗流阈值具有一致性。Polystyrene （PS）/multiwalled carbon nanotube （MWNTs） composite fibers were prepared via micro melt extrusion and melt spinning. Modifier was used to increase the draw ratios of the composite. Optical microscope and scanning electron microscopy results show that MWNTs disperse homogeneously in the matrix when its content is lower than 2 %. Higher nanotube loading resulted in the larger aggregation and bad dispersion, and most of MWNTs orientated along the fiber axis. The tensile strength and dimensional stability of the composite fibers are improved with a comparatively lower MWNTs content. The electrical percolation threshold occurs when the MWNTs content is between 2% and 5%. The dynamic rheologieal percolation threshold of the composite is corresponding to the electrical percolation threshold.

关 键 词：聚苯乙烯 多壁碳纳米管 复合丝 电性能 力学性能 成丝性 

分 类 号：TB383[一般工业技术—材料科学与工程]