PE-HD在应力场中的双向自增强研究  

Study on Two-dimensional Self-reinforcement of PE-HD in Two-dimensional Compound Stress Field

作　　者：袁毅[1] 徐绍虎[1] 崔爽[1] 申开智[2] 

机构地区：[1]重庆工商大学机械工程学院废油资源化技术与装备教育部工程研究中心,重庆400067 [2]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：《中国塑料》2011年第9期75-78,共4页China Plastics

摘　　要：利用自制的剪切拉伸双向复合应力场挤管装置生产出双向自增强的高密度聚乙烯(PE-HD)管材,研究分析了双向应力场对PE-HD管材的拉伸强度、微观分子取向和结晶度的影响。结果表明,剪切拉伸双向复合应力场能实现管材轴周向性能的双向自增强,提高管材分子的取向度和结晶度;其轴向拉伸强度最高增强到25.82MPa,提高了14.8%,周向拉伸强度最高增强到24.52MPa,提高了13%;其分子结构由明显的球晶结构转变为高度取向的串晶结构,结晶度达到71.95%。Through a shearing-drawing two-dimensional stress field applied in a pipe-extrusion die developed by this group, two-dimensional self-reinforcement high density polyethylene （PE-HD） pipes were prepared. The tensile strength, molecule orientation and crystallinity of the pipe were studied. It showed that the two-dimensional stress field improved the molecule orientation and crystallinity, and the circular and axial tensile strength of the pipes were improved simultenously. The best circular and axial tensile strength were 24. 52 MPa and 25.82 MPa, increased by 13 % and 14. 8 % , respectively, based on regular pipes. The crystallinity was increased to 71.95 % . A shish kebab structure was observed.

关 键 词：高密度聚乙烯 剪切拉伸双向复合应力场 双向自增强 取向 结晶 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]