限定几何构型茂金属催化POE高速流变性能  

Rheological Behavior at High Extrusion Rate of POE Produced by CGC and INSITETM Technology

作　　者：张娜[1] 慕晶霞[1] 王宁[1] 赵贝[1] 吴其晔[1] 

机构地区：[1]青岛科技大学教育部橡塑工程重点实验室,山东青岛266042

出　　处：《现代塑料加工应用》2007年第5期47-50,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金(50573037;50390090)

摘　　要：采用双毛细管流变仪研究了由限定几何构型催化剂和INSITETM^(TM)工艺开发的聚烯烃弹性体(POE)的流变性能,分析了POE Engage 8003和POE Engage 8150的粘弹性行为、高速挤出时熔体流动不稳定性及挤出物外观。结果表明,POE为线型分子结构,当剪切速率达到某一临界值时,挤出物表观出现鲨鱼皮畸变;Engage 8003与Engage 8150比较,前者的粘-温敏感性较大且挤出物外观明显好于后者,而后者的粘-切敏感性较大。粘-温和粘-切敏感性的差别与分子结构有关,Engage 8003的辛烯含量低,塑料特性更明显,相对而言Engage 8150的弹性体行为更加显著。The rheological behavior of POE produced by CGC and INSITETM technology was studied by a double capillary rheometer. The viscoelasticity, melt flow instability at high extrusion rate and the extrudate appearance of POE Engage 8003 and POE Engage 8150 were investigated. The results show that POE has linetype molecule structure and sharkskin fracture occurs when the shear rate achieves a critical value. The influence of temperature on melt viscosity of Engage 8003 is obvious and the extrudate appearance of Engage8003 is better than that of Engage 8150, but the influence of shear rate on melt viscosity of Engage 8150 is stronger than on Engage 8003, which is due to the different molecule structures of them. Engage 8003 exhibits more plastic characteristic for having lesser octane component, comparatively, Engage 8150 puts up more elastomer behavior.

关 键 词：聚烯烃弹性体 流变性能 双毛细管流变仪 鲨鱼皮畸变 

分 类 号：TQ317[化学工程—高聚物工业]