中国塑料 ›› 2012, Vol. 26 ›› Issue (04): 45-49 .DOI: 10.19491/j.issn.1001-9278.2012.04.009

• 材料与性能 • 上一篇    下一篇

增容剂对PE-HD/PC/CB导电复合材料PTC效应的影响

唐军辉 王兆波 胡海青 陶勇 王新   

  1. 青岛科技大学 青岛科技大学 材料科学与工程学院 青岛科技大学 青岛科技大学
  • 收稿日期:2011-11-23 修回日期:1900-01-01 出版日期:2012-04-26 发布日期:2012-04-26

Effects of Different Compatibilizers on PTC Behaviors of PE-HD/PC/CB Conductive Composites

Tang Jun-Hui Xin Wang   

  • Received:2011-11-23 Revised:1900-01-01 Online:2012-04-26 Published:2012-04-26

摘要: 研究了增容剂马来酸酐接枝聚乙烯(PE-g-MAH)、乙烯-醋酸乙烯酯(EVA)、苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)对高密度聚乙烯(PE-HD)/聚碳酸酯(PC)/炭黑(CB)复合材料导电性能的影响。结果表明,加入增容剂有利于增强复合材料的正温度系数(PTC)效应,其中嵌段共聚物SBS对复合材料PTC效应的改善效果相对较好,SBS含量为4 %(质量分数,下同)时,复合材料的PTC强度最高,比未添加时提高了14.3 %;接枝共聚物PE-g-MAH的加入对复合材料PTC效应的增强效果弱于SBS;无规共聚物EVA的加入对负温度系数(NTC)现象具有明显的抑制作用,使复合材料的NTC强度从0.3下降至0.08。

关键词: 高密度聚乙烯, 聚碳酸酯, 炭黑, 增容剂, 正温度系数, 负温度系数

Abstract: Effects of three kinds of compatibilizers, maleic anhydride grafted high-density polyethylene (PE-g-MAH), ethylene vinyl acetate (EVA) and styrene-butadiene-styrene block copolymer (SBS), on electrical properties of high-density polyethylene (PE-HD) / polycarbonate (PC) /carbon black (CB) composites were studied. It showed that the addition of compatibilizers to PE-HD/PC/CB composites promoted the positive temperature coefficient (PTC), and the modification effect of SBS was the best among the three compatibilizers. When the content of SBS was 4 wt %, the PTC intensity of the composite increased by 14.3 % based on neat PE-HD/PC/CB composite. The promotion of PTC intensity by PE-g-MAH was less than that of SBS. EVA had the advantage to inhibit the negative temperature coefficient (NTC) phenomenon, the NTC intensity of the composites decreased from 0.3 to 0.08.

Key words: high density polyethylene, polycarbonate, carbon black, compatibilizer, positive temperature coefficient, negative temperature coefficient