振动力场作用下聚合物熔体分子动力学(Ⅱ) 表观黏度的影响  

Polymer melt molecule dynamics under impact of vibration force field (Ⅱ) Effect of apparent viscidity

作　　者：曾广胜 瞿金平 

机构地区：[1]华南理工大学聚合物新型成型装备国家工程研究中心聚合物成型加工工程教育部重点实验室,广东广州510640

出　　处：《化工学报》2007年第12期3164-3169,共6页CIESC Journal

基　　金：国家自然科学基金项目(20074010;10472034;10590351;20027002);高等学校博士学科点专项基金项目(2003056014);华南理工大学优秀博士学位论文创新基金项目~~

摘　　要：在本文(Ⅰ)报所建立的振动力场作用下聚合物分子运动物理模型和解析模型的基础上,推导出了振动诱导作用下聚合物熔体动态表观黏度与振动频率的关系表达式。通过实例计算和动态流变仪实验验证,证明了该模型的正确性和有效性,并且得出结论:振动力场作用下,聚合物熔体的表观黏度与振动频率密切相关,表观黏度随振动频率增加而减小;当振幅大于聚合物分子链长度时(一般都会大于分子链长度),再增加振幅对表观黏度的影响不大。证明了(Ⅰ)报中物理模型以及数学推导的正确性,为聚合物成型加工工艺制定及成型设备研制提供了理论依据。With the help of physical and analytical models of polymer molecule movement described in Part（Ⅰ）,the expression of vibration frequency and polymer melt dynamic apparent viscidity is obtained.The theory is supplemented by a numerical sample and experiments which show that the dynamic apparent viscidity of polymer melt is related to vibration frequency,and it decreases as frequency increases;when the amplitude is longer than the length of polymer molecule chain,it does not affect the apparent viscidity.The theoretical result agrees with that of experiment,which proves that the physical model and the analytical model are valid.This research will serve as the basis for polymer processing and equipment design.

关 键 词：振动 聚合物材料 分子动力学 珠簧模型 黏弹性 

分 类 号：O321[理学—一般力学与力学基础] TQ320.1[理学—力学]