茂金属聚乙烯的固态挤出行为及力学性能  

THE EXTRUSION BEHAVIOR AND MECHANICAL PROPERTIES OF METALLOCENE POLYETHYLENE BY SOLID STATE EXTRUSION

作　　者：欧阳初[1] 郭建明[1] 申开智[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065

出　　处：《高分子材料科学与工程》2003年第6期168-171,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金(29934070);高校博士点基金(2000061021)资助项目

摘　　要：主要采用一种具有复合应力场的挤出口模,通过固态挤出茂金属线性低密度聚乙烯获得双向自增强片材。研究表明,茂金属聚烯烃可成功地进行固态挤出,所得到自增强片材的纵横向屈服强度都有明显提高,纵向屈服强度最大提高了5倍,横向屈服强度最大提高了约57%,但拉伸强度变化不大。纵向屈服强度和模量随拉伸比增加而提高。挤出温度对试样的力学性能、表面质量和出模膨胀有一定影响。Biaxial self-reinforced metallocene linear low density polyethylene sheet was prepared by the die with complex stress field in solid state. The result shows that the metallocene polyethylene can be extruded accomplished, the longitudinal yield strength and the transverse yield strength are increased markedly, which there are 5-fold increase in the extrusion direction and the 57% increase in transverse direction, while the tensile strength has little raise. The longitudinal yield strength and the Young′s modulus increase with the draw ratio. The extrusion temperature also affectes the samples tensile properties, surface quality and die swell.

关 键 词：茂金属聚乙烯 固态挤出 力学性能 复合应力场 加工工艺 催化剂 

分 类 号：TQ426.7[化学工程]