旋转／牵引速度比对旋转挤出聚乙烯管结构和性能的影响  

Effect of Rotating and Drawing Speeds on the Structure and Properties of Polyethylene Pipes Prepared by Rotation Extrusion

作　　者：胡晓阳[1] 聂敏[1] 白时兵[1] 王琪[1] 

机构地区：[1]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2013年第6期50-53,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金科学仪器基础研究专项资助(51127003,51121001)

摘　　要：采用自行研制的聚合物管旋转挤出装置,研究了旋转挤出过程中旋转/牵引速度比对聚乙烯(PE)管结构和性能的影响。扫描电镜(SEM)和热收缩实验结果表明,通过控制旋转/牵引速度比,可有效调节PE管内串晶偏离轴向的角度,降低轴向取向度,提高PE管的力学性能。当旋转/牵引速度比为0.6时,旋转挤出PE管的环向拉伸强度从常规挤出管的19.4MPa提高到33.5MPa,提高了72.7%。In this paper, a self-designed rotation extrusion system was adopted to extrude PE pipes, and the effects of rotating speed/drawing speed ratio on their structure and properties were investigated. The SEM photos and thermal shrinkage results show that by controlling the rotating speed/drawing speed ratio, the axial orientation degree that the shish-kebab crystals in PE pipe deviates from the axial direction is reduced and the hoop strength is improved. When the rotating speed/drawing speed ratio is 0.60, the hoop strength of the PE pipe reaches 33.5MPa from 19.4MPa, 72.7% higher than that of the conventionally prepared pipe.

关 键 词：旋转挤出 聚乙烯管 结构 性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]