超高分子量聚乙烯气辅挤出影响因素的数值模拟及分析  

Numerical Simulation and Analysis of the Effect of Some Materials and Processing Parameters on the Gas Assisted Extrusion of Ultra-high Molecular Weight Polyethylene

作　　者：柳和生[1] 张小霞[2] 

机构地区：[1]上饶师范学院,江西上饶334001 [2]南昌大学聚合物加工研究室,江西南昌330013

出　　处：《塑料》2012年第1期94-97,8,共5页Plastics

基　　金：江西省自然科学基金项目(2008GZC0064)

摘　　要：以超高分子量聚乙烯的圆形轴对称气辅口模挤出为研究对象,在采用Polyflow软件对气辅口模挤出时的等温流动进行数值模拟之后,就入口流率、松弛时间以及零剪切黏度等物性和工艺参数对挤出胀大、速度分布、口模压降和熔体外表面上剪切速率的影响进行了数值模拟和分析。分析表明:气辅挤出是克服超高分子量聚乙烯传统挤出时面临一系列困难的有效加工方式。After the numerical simulation of the isothermal flow of ultra-high molecular weight polyethylene meh in a gas assisted circular tube die, the numerical simulation and analysis were finished for the effect of such materials and processing parameters as entrance flow rate, relax time and zero-shear viscosity on the die swell rate, velocity distribution, die pressure drop and shear rate on the melt external face. Such analysis indicated that gas assisted extrusion was an effective technique for extrusion of ultra-high molecular weight polyethylene, which could overcome the difficulty occurring in the conventional extrusion of ultra-high molecular weight polyethylene.

关 键 词：超高分子量聚乙烯 气体辅助挤出 数值模拟 塑料挤出 流动分析 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]