复合应力场下挤出HDPE增强管材性能的研究  

PROPERTIES OF SELF-REINFORCEMENT HDPE PIPE EXTRUDED UNDER COMPLEX STRESS FIELD

作　　者：李安定[1] 袁毅[1] 申开智[1] 陈长森[1] 柯文体[1] 

机构地区：[1]四川大学高分子材料国家重点实验室,成都610065

出　　处：《现代塑料加工应用》2005年第4期40-42,共3页Modern Plastics Processing and Applications

基　　金：国家自然科学基金资助项目(20174026)。

摘　　要：用自行研制的能产生先剪切后拉伸的复合应力场挤出成型装置,挤出高密度聚乙烯(HDPE)管材,对管材周向、轴向力学性能进行了初步的研究。与一般牌号为DGDA6098的HDPE比,在HDPE中添加高相对分子质量高密度聚乙烯(HMWHDPE)后,发现HMWHDPE能够诱导HDPE沿应力场方向产生大分子取向和结晶。利用差示扫描量热仪(DSC)和扫描电镜(SEM)检测手段对试样的凝聚态结构进行分析,证实了复合应力场下制备的自增强管材双向力学性能都提高了。HDPE pipes were extruded by using a self-made extrusion die with complex stress field of shearing frist and then drawing during extrusion. The circumferential and axial properties of pipes were studied respectively. In contrast with general HDPE （DGDA6098）, when high molecular weight HDPE is added into general HDPE, high molecular weight HDPE contributes to inducing HDPE orientation and crystallization along the stress-field. The aggregate state structure of products was studied by DSC and SEM. It is proved that meachanics properties of the self-reinforced HDPE pipes in hoop and axis directions can be achieved under the complex stress field.

关 键 词：复合应力场 双向自增强 挤出 高密度聚乙烯 塑料管 管材性能 HDPE 扫描电镜(SEM) 高相对分子质量 差示扫描量热仪 

分 类 号：TQ320.724[化学工程—合成树脂塑料工业]