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借助HAAKE转矩流变仪,采用熔融共混法制备了一系列Cu粉含量不同的Cu/丙烯腈-丁二烯-苯乙烯共聚物(ABS)复合材料,采用多层叠压法制备了内部Cu粉含量逐渐变化的板状Cu/ABS复合导电梯度功能材料,并对其结构和性能进行了表征。结果表明,所制备导电梯度功能材料的性能与均质复合材料存在很大差异。电性能测试结果显示,随着Cu粉含量沿板材厚度方向的梯度增加,其导电性能发生逾渗转变,体积电阻率从一侧的1016Ω.cm降低到另一侧的105Ω.cm。弯曲性能测试表明,富含ABS树脂的一侧表现出较高的弯曲强度,仅比纯ABS的弯曲强度低6%;而富含填料的另一侧则表现出较高的模量,比纯ABS高约20%。实验证明,将导电复合材料做成梯度结构可以兼顾材料的导电性能和力学性能。
A series of Cu / acrylonitrile-butadiene-styrene copolymer (ABS) composites with different contents of Cu powder were prepared by melt blending method with HAAKE torque rheometer. The internal Cu The content of Cu / ABS composite conductive graded functional material with varying powder content was characterized and its structure and properties were characterized. The results show that there is a great difference between the performance of the prepared conductive gradient functional material and the homogeneous composite material. The results of electrical property test show that the conductivity changes percolation with the increase of the gradient of Cu powder along the thickness of the sheet, and the volume resistivity decreases from 1016Ω.cm on one side to 105Ω.cm on the other side. Bending performance tests showed that the side rich in ABS resin showed a higher flexural strength, which was only 6% lower than the bending strength of pure ABS, while the other side rich in filler showed a higher modulus than pure ABS high about 20%. Experiments show that the conductive composite material made of gradient structure can take into account both the conductivity and mechanical properties of the material.