固态挤出HDPE性能与结构研究  

STUDY ON PROPERTIES AND STRUCTURE OF HDPE BY SOLID STATE EXTRUSION

作　　者：陈长森[1] 申开智[1] 李安定[1] 高雪芹[1] 柯文体[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,成都610065

出　　处：《现代塑料加工应用》2005年第3期32-34,共3页Modern Plastics Processing and Applications

摘　　要：采用4个不同拉伸比的口模,在较低速度下对高密度聚乙烯(HDPE)成功地实现了固态挤出。结果表明,试样的拉伸强度最大提高到250MPa。采用SEM测试分析其微观结构表明,试样中生成了大量高度取向的微纤结构;DSC分析表明,试样的结晶度增加,晶片增厚,晶体的尺寸更加均匀。Highly oriented high density polyethylene (HDPE) samples were obtained by solid state extrusion under comparably low speed, with four dies and different draw ratio. The results showed that the sample's maximum tensile strength increases to about 250 MPa. Microstructure was observed by SEM and the results indicated a great deal of highly oriented microfibrillar structure exists in the solid state extruded samples. The results of DSC measurement showed crystallinity of the samples increases, the crystal plate is thickened and the crystal's size is much more homogeneous.

关 键 词：固态挤出 结构研究 HDPE 性能 高密度聚乙烯 拉伸强度 微观结构 测试分析 微纤结构 高度取向 拉伸比 低速度 试样 SEM 分析表 DSC 结晶度 口模 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]