FEP/PP共混物熔体挤出胀大行为研究  

Research on Extrusion Swell Behaviour of FEP/PP Blend Melt

作　　者：梁基照[1] 彭万[1] 

机构地区：[1]华南理工大学工业装备与控制工程学院,广东广州510640

出　　处：《现代塑料加工应用》2008年第3期25-27,共3页Modern Plastics Processing and Applications

摘　　要：应用熔体流动速率仪考察了聚丙烯(PP)含量、温度、载荷及口模直径对FEP(聚全氟乙丙烯)/PP共混物熔体的挤出胀大行为的影响。结果表明,在试验条件下,FEP/PP共混物熔体的挤出胀大比(B)基本上随着温度的升高而线性增大,随着载荷的增加而非线性提高,随着PP含量的增加B略为下降;当口模直径小于1.500 mm时,B随着口模直径的增加急速减少,然后,B随着口模直径的增加显著增加。The influences of PP content, die diameter, loading and temperature on the extrusion swell behaviour of FEP/PP blend melt were investigated by using a melt flow rate instrument. The results show that the die swell ratio （B） of the FEP/PP blend melt presents a approximately linear increase with an increase of temperature, a nonlinear increase with an increase of loading, and a slight decrease with an increase of PP content. When the die diameter （D） is less than 1. 500 mm, the B of the FEP/PP blend melt reduces quickly with an addition of D, whereas B increases obviously with an addition of D when D is more than 1.5 mm.

关 键 词：聚全氟乙丙烯 聚丙烯 共混熔体 挤出 口模膨胀 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]