中空容器专用HDPE树脂的结构与性能  

Structure and properties of HDPE speciality resins for hollow containers

作　　者：李朋朋[1] 薛山[1] 周超英[1] 谢昕[1] 

机构地区：[1]中国石油天然气股份有限公司兰州化工研究中心,甘肃省兰州市730060

出　　处：《合成树脂及塑料》2012年第3期50-52,60,共4页China Synthetic Resin and Plastics

摘　　要：分析了进口和国产中空容器专用高密度聚乙烯树脂的基本性能、毛细管流变性能、动态流变性能、熔体强度。结果表明:进口树脂具有相对分子质量分布较窄、支化度较高、耐环境应力开裂性能优异的特点;相对分子质量分布较宽的国产树脂由于高相对分子质量尾端含量高而具有较高黏性、较低弹性,高剪切速率下黏度大,熔体可拉伸性能不如进口树脂。The authors analyzed the basic properties, capillary and dynamic theology, and melt strength of the imported and domestic high density polyethylene （HDPE） speciality resins for hollow containers. The results show that the imported HDPE resin has characteristics of narrow relative molecular mass distribution, high relative branching degree and superior environmental stress-cracking resistance. The domestic HDPE resin with wide relative molecular mass distribution have lower elasticity, higher viscidity and higher viscosity at high shear rates due to its larger portion of extremely high relative molecular mass in the distribution. Therefore, its melt tensile property is inferior to that of the imported HDPE resin.

关 键 词：高密度聚乙烯 中空容器 动态流变 相对分子质量分布 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]