【摘要】 用熔融共混法制备了3种丙烯腈-丁二烯-苯乙烯共聚物（ABS）/Cu粉复合材料,考察了Cu粉含量、相容剂马来酸酐接枝乙烯-醋酸乙烯（EVA-g-MAH）和四钛酸钾（K₂Ti₄O₉）晶须对ABS/Cu粉复合材料性能的影响。结果表明,ABS/Cu粉复合材料性能的变化符合金属粉末填充聚合物基体的一般规律,Cu粉在质量分数60%左右复合材料出现渗流阈值;EVA-g-MAH的加入,改善了复合材料的力学性能,但在Cu粉质量分数65%时复合材料渗流出现,并且使逾渗区间变窄;K₂Ti₄O₉的加入,提高了复合材料的导电性,在Cu粉质量分数为55%时,复合材料出现渗流同时使逾渗区间变宽,证明了"有效浓度"概念在本研究体系中是成立的。更多还原

【Abstract】 Three kinds of ABS/Cu powder composites were prepared by melt blending. The effects of the Cu power content,compatibilizer EVA-g-MAH and K₂Ti₄O₉ whisker on the properties of the ABS/Cu powder composites were discussed.The results indicate that the ABS/Cu powder composites accord with the general rule of polymeric conductive composites filled by metal powder.The percolation threshold of the composites appears when Cu powder is about 60%.EVA-g-MAH improves the mechanical properties of the composites, but the percolation threshold of the composites emerges when Cu powder is 65%,and the percolation range becomes narrow.K₂Ti₄O₉ improves conductive property of the composites, the perconlation threshold emerges when Cu powder is 55%,and the percolation range becomes wide.The experimental fact also gives a support of the concept of effective concentration in this conductive composite system.更多还原