摘要
利用固体合金化方法,制备了不同质量比的聚醚醚酮(PEEK)多/壁碳纳米管(MWNT)复合材料,通过场发射扫描电镜观察了微观形貌;对比研究了缓冷和速冷模压成型复合材料的交流电性能参数;并基于等效电路模型进行了拟合分析。结果表明:固体合金化方法能实现MWNT在PEEK基体中的短切与良好分散,有利于导电网络的形成;PEEK/MWNT复合材料的交流电性能参数随频率和MWNT含量的变化而有规律地变化;速冷模压成型有效降低了材料的电阻和体系的逾渗阈值;PEEK/MWNT复合材料的导电性能越好,其拟合结果越理想。
Polyetheretherketone （ PEEK ）/multi-walled carbon nanotubes （ MWNTs ） composites were prepared by solid alloying ;the microstructures were observed by field emission scanning electron microscope ; AC electrical properties of two kinds of composites prepared by slow cooling and rapid cooling were eompared; and an equivalent CSrcuit was proposed to fit the experimental data. The results showed that MWNT could be cut short and dispersed well in PEEK matrix by solid alloying, which was benefit to form conductive network; the AC electrical property parameters of PEEK/MWNT composites changed with frequency and MWNT content regularly;the resistance and percolation threshold of composites could be decreased by the rapid cooling process;the fitted results were better if the electrical properties of PEEK/MWNT composites were better.
出处
《塑料》
CAS
CSCD
北大核心
2008年第2期8-13,共6页
Plastics
基金
国家高技术研究发展专项经费资助(2006AA03Z562)
关键词
聚醚醚酮
多壁碳纳米管
固体合金化
交流电性能
等效电路
polyetheretherketone
multi-walled carbon nanotube
solid alloying
AC electrical property
equivalent circuit
