CPCs在应力场下的性能演变及机理研究进展

综述了导电高分子复合材料(CPCs)在压缩应力场、拉伸应力场及应力-应变循环力场中电阻率随应力、应变、循环次数及时间等的变化规律,分析了CPCs在上述应力场中电阻率变化与其微观结构演变之间的关系,结合导电粒子在高分子基体中的位置改变及导电粒子与高分子基体间相互作用,归纳了CPCs电性能在上述外力场中的演变机制。针对目前该复合材料在上述循环应力场中出现的磁滞效应和可重复性差等问题,归纳了相应的改善方法。简要概括了CPCs的工业应用。

Progress of research on performance evolution and mechanism of conductive polymer composites in stress fields

The authors reviewed the variation rules of resistivity of conductive polymer composites(CPCs) with stress,strain,cycle times and time in the pressure field,tensile field and stress-strain cycle field.The relation between the variation of the resistivity and the microstructure evolution of CPCs in the mentioned stress fields was analyzed.The evolving mechanism of the conductive property of CPCs in these stress fields was deduced based on the position change of conductive particles in polymer matrices and the interaction between the conductive particles and the polymer matrices.Some pertinent methods for dealing with the problems of CPCs in the above cycle stress fields like hysteresis and reproducibility were summed up.The industrial applications of CPCs were also briefly outlined.