新型聚烯烃弹性体的高速挤出畸变特征及其流动扰动源探讨  

Study of the Melt Flow Instability Behaviors of Polyolefin Elastomer at High Speed Extrusion

作　　者：张娜[1] 王宁[1] 赵贝[1] 宋相澎[1] 吴其晔[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2009年第2期151-155,共5页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(50573037;50390090)

摘　　要：采用双毛细管流变仪研究由限定几何构型催化剂和INSITETM工艺开发的聚烯烃弹性体(POE Engage)和三元乙丙橡胶(EPDM Nordel IP)在高速挤出时的不稳定流动现象和挤出畸变特征,并对各类不同挤出畸变的扰动源进行了探讨。结果表明,鲨鱼皮和螺纹状畸变的空间起源在口模出口处,竹节状黏-滑畸变与挤出压力振荡现象是由于熔体/口模壁处的整体黏-滑转变引起,而熔体整体无规破裂现象则与口模入口区的扰动有关。The melt flow instability behavior and the causes of the extrusion distortion of POE Engage and EPDM Nordel IP produced by CGC and INSITETM technology were systematically studied using a double capillary rheometer at constant speed. The result indicated that the sharkskin fracture was caused by the interface instability at die exit and the extrusion pressure oscillation was due to the stick-slip transition at the interface between the melts and die wall. However, the random fractures were related to the flow turbulence at the die entrance.

关 键 词：聚烯烃弹性体 三元乙丙橡胶 挤出畸变 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]