壁面滑移对聚合物微挤出成型流变特性的影响研究  

Study on effects of wall slip on rheological properties of polymer micro extrusion

作　　者：冯英聪 王敏杰[1] 李红霞[1] 高健 孙昉 FENG Ying-cong;WANG Min-jie;LI Hong-xia;GAO Jian;SUN Fang(School of Mechanical Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;Dalian Representative Office,Dalian,Liaoning 116024,China)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024 [2]陆装大连军代室,辽宁大连116024

出　　处：《模具工业》2021年第8期1-8,共8页Die & Mould Industry

基　　金：国家自然科学基金项目(51675079)。

摘　　要：建立了微尺寸下壁面滑移的剪切黏度模型和粘性耗散模型,计算了聚苯乙烯材料在微挤出成型过程中考虑壁面滑移的速度和压力分布情况,并分析了速度和压力的变化对剪切黏度和粘性耗散等流变特性的影响规律。结果表明,壁面滑移导致剪切黏度和粘性耗散对速度和压力的响应产生显著的变化,聚合物微挤出成型过程中壁面滑移对剪切黏度和粘性耗散的影响不可忽略。The shear viscosity model and viscous dissipation model considering wall slip at micro scale were established,the velocity and pressure distribution of polystyrene(PS)material consid⁃ering wall slip in micro extrusion process were calculated,and the effects of velocity and pressure on shear viscosity and viscous dissipation were analysed.The results showed that the responses of shear viscosity and viscous dissipation to velocity and pressure changed significantly due to wall slip.Therefore,the effects of wall slip on shear viscosity and viscous dissipation in polymer micro extrusion process couldn't be ignored.

关 键 词：聚合物 微挤出成型 壁面滑移 剪切黏度 粘性耗散 

分 类 号：TG76[金属学及工艺—刀具与模具] TP391.75[自动化与计算机技术—计算机应用技术]