聚合物熔体窄缝脉动挤出行为的光散射研究  

RESEARCH ON VIBRATION EXTRUSION BEHAVIOR OF POLYMER MELTS FLOWING IN SLIT DIE BY LIGHT SCATTERING

作　　者：瞿金平[1] 韦宇昕[1] 冼广铭[1] 

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,广州510640

出　　处：《工程塑料应用》2005年第6期26-29,共4页Engineering Plastics Application

基　　金：国家自然科学基金资助项目(20027002)

摘　　要：利用聚合物熔体的双折射性质,对振动力场作用下窄缝挤出模头中的聚合物熔体脉动挤出行为进行光散射研究,用光弹性图像和光强度矩阵来表征聚合物熔体受到的剪切应力。振动力场的引入使光弹性图像和光强度矩阵发生了规律性变化。结果表明,振动力场使聚合物熔体剪切应力减小、表观粘度降低,最终使得挤出压力降低、产量提高。Polymer melts have the quality of double refraction. So the method of light scattering was used to research the behavior of polymer melts flowing in the slit die in vibration force field, and the shearing stress of polymer melts is characterized by photoelastic pattern and light intensity matrix. Vibration field can make the photoelastic pattern and light intensity matrix change regularly. The result shows that vibration field can decrease the shearing stress and apparent viscosity of polymer melts, so the extrusion pressure is cut down and the yield is increased finally.

关 键 词：聚合物熔体 光散射 出行 脉动 窄缝 振动力场作用 剪切应力 挤出模头 粘度降低 产量提高 光强度 光弹性 双折射 规律性 压力降 图像 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业] O436.2[机械工程—光学工程]