挤出牵引速度对聚乙烯/金属锡导电复合材料性能的影响  

Effect of Take-up Speed While Extruding on the Properties of PE/Stannum Conductive Composites

作　　者：何全国[1] 梁全才[1] 胡澜[1] 

机构地区：[1]煤炭科学研究总院重庆研究院,重庆400037

出　　处：《中国塑料》2010年第8期72-74,共3页China Plastics

摘　　要：采用高温挤出热拉伸—低温注射成型的加工工艺,制备了聚乙烯/金属锡(PE/Sn)导电复合材料,研究了挤出造粒时不同切粒机转速(即热牵引速度)和Sn用量对其微观结构、导电性能及力学性能的影响。结果表明,当切粒机的转速由常规的35 r/min提高到50 r/min时,Sn在PE基体中成纤更细更长,PE/Sn复合材料导电所需的Sn的最低含量由常规时的9.2%(质量分数,下同)降低到6.2%,即导电逾渗值降低,且复合材料的力学性能略有上升。Polyethylene/stannum （PE/Sn） conductive composites were prepared via high temperature extrusion and stretching and low temperature injection process. The effect of pelletizer speed （that is stretching speed） and contents of Sn on the microstructure, electrical conductivity and mechanical properties were studied. Results showed that when the pelletizer speed increased from 35 r/min to 50 r/min, the stannum dispersed phase was stretched into smaller and longer fibers in the PE matrix, and the content of Sn that induced electrical conductivity decreased from 9.2 wt % to 6.2 wt %, which means the percolation threshold of the PE/Sn composites decreased, and the mechanical properties of the composites increased.

关 键 词：聚乙烯 锡 复合材料 牵引速度 导电性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]