组合发泡剂对聚丙烯发泡行为的影响研究  

Effects of Compound Foaming Agents on Foaming Behavior of Polypropylene

作　　者：王向东[1] 周洪福[1] 刘伟[1] 刘本刚[1] 

机构地区：[1]北京工商大学材料与机械工程学院,北京100048

出　　处：《工程塑料应用》2012年第7期76-80,共5页Engineering Plastics Application

基　　金：科技部科研院所技术开发研究专项资金项目(2008EG111015)

摘　　要：采用物理发泡剂和化学发泡剂的组合发泡剂对聚丙烯(PP)和高熔体强度聚丙烯(HMSPP)在自制的单螺杆串联单螺杆挤出发泡机组上进行挤出发泡试验。通过真密度计/开闭孔率测定仪和扫描电子显微镜对发泡制品的密度、发泡倍率和泡孔形态进行测试。研究结果表明,采用组合发泡剂后,大部分PP和HMSPP发泡制品的泡孔密度提高,发泡倍率增加,泡孔尺寸分布更加均匀,泡体结构优于单独使用物理发泡剂或化学发泡剂的发泡制品。The foaming extrusion of linear polypropylene （ PP ） and high melt strength PP （ HMSPP ） was processed using the combination of physical and chemical agents on the self-designed single-single screw extruder tandem reactive extrusion line. The foam density and foam morphology of linear PP and HMSPP were tested by densimeter and scanning electron microscopy. The results showed that the cell density and foaming ratio of most samples increased, and the cell morphology of both linear PP and HMSPP could be improved effectively using compound foaming agents, compared with the foaming product produced by single foaming agent.

关 键 词：线形聚丙烯 高熔体强度聚丙烯 组合发泡剂 发泡行为 

分 类 号：TB324[一般工业技术—材料科学与工程]