高密度聚乙烯熔体拉伸流动特性分析  

Analysis of Elongation Flow Properties of High Density Polyethylene Melt

作　　者：钟磊[1] 梁基照[1] 

机构地区：[1]广州华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《华侨大学学报（自然科学版）》2010年第2期149-152,共4页Journal of Huaqiao University(Natural Science)

基　　金：广西青年自然科学基金资助项目(0542018)

摘　　要：基于PTT(Phan-Thien-Tanner)模型,将温度引入结点破坏率H函数中,构建新的聚合物流体本构方程.应用该方程,分析温度对聚乙烯熔体拉伸流动中拉伸应力和拉伸粘度的影响.结果显示,随着温度的升高,熔体的拉伸应力和拉伸粘度都随之下降.Temperature as a parameter was considered in H function with respect to the node destroying rate and a new constitutive equation for the polymer fluid was proposed based on Phan-Thien-Tanner （PTT） model. The effects of temperature on stress and viscosity during elongation flow of high density polyethylene melt were analyzed by use of the equa tion. The results showed that both the stress and extensional viscosity decreased with a rise of temperatures.

关 键 词：聚乙烯熔体 拉伸流动 PTT模型 生成率 温度 

分 类 号：O632.12[理学—高分子化学] O631.2[理学—化学]