用毛细管流变仪研究发泡聚丙烯(PP)挤出胀大行为  

Extrusion Die Swell of PP Foam with Capillary Rheometer

作　　者：周剑明[1] 王喜顺[1] 

机构地区：[1]华南理工大学工业装备与控制工程学院塑料橡胶装备及智能化研究中心,广东广州510640

出　　处：《塑料》2005年第6期45-49,共5页Plastics

基　　金：国家自然科学基金(NNSF10172074/A020205纳米复合塑料微孔形态设计研究)

摘　　要：利用毛细管流变仪研究发泡聚丙烯(PP)挤出胀大行为,观察了压力、温度等参数与膨胀率的关系,分析加入不同的AC发泡剂和CaCO3后其膨胀率不同的变化情况,指出这不仅仅是因为发泡体系弹性的变化,气泡的存在也对其膨胀率影响很大。Die swell of PP foam was investigated by capillary rheometer. The effects of the pressure and temperature on the die swell of PP foam were discussed. The differences of die swell ratio of PP foam with different contents of AC foaming agent and CaCO3 were analyzed. It was pointed out that the differences of die swell ratio were not only because of the change of elasticity, but also the existence of bubbles.

关 键 词：聚丙烯 发泡 毛细管流变仪 挤出胀大 膨胀率 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]