中国塑料 ›› 2008, Vol. 22 ›› Issue (06): 77-82 .DOI: 10.19491/j.issn.1001-9278.2008.06.017

• 标准与测试 • 上一篇    下一篇

PP/CO2体系流变性能的在线测量

谢兴阳,何亚东,信春玲,李庆春   

  1. l.北京化工大学机电工程学院,北京100029: 2.北京市新型高分子材料制备与加工重点实验室,北京100029
  • 收稿日期:2008-03-03 修回日期:1900-01-01 出版日期:2008-06-25 发布日期:2008-06-25

In-line Measurement of Rheological Behavior of Polypropylene/C02 System

XIE Xing-yang,HE Ya-dong,XIN Chun-ling,LI Qing-chun   

  1. 1.School of Mechanical and Electronic Engineering, Beijing University of Chemical Technology, Beijing 100029,China2. The Key Laboratory of Beijing City on Processing of Novel Polymers, Beijing 100029,China
  • Received:2008-03-03 Revised:1900-01-01 Online:2008-06-25 Published:2008-06-25
  • Contact: XIE Xing-yang

摘要: 采用具有快速收敛入日区的狭缝流变模具和Labview数据采集系统,对不同温度及不同注气量条件下的聚丙烯(PP)/CO2体系的流变行为进行研究,探讨了超临界CO2/PP体系黏度曲线的变化规律,并通过超声波探测系统,测量PP/CO2体系的临界发泡压力。结果表明,不同工艺条件下PP/CO2体系的钻度曲线具有相似的斜率,且随注气量和体系温度的增大而线性降低;在体系温度175℃时,发泡临界压力随剖本系温度的降低而增大。

关键词: 在线流变测量, 缝隙模具, 聚丙烯, 二氧化碳, 临界发泡压力

Abstract: By using a slot rhcological die with a slit channel and I,abvicw data collection system, rhcological behavior of polypropylene/supercritical carbon dioxide mixture was studied at different temperatures and gas concentration. Critical foaming pressure of PP/COz system was also determined by utilizing a novel ultrasonic detecting system. It showed that the viscosity curves under different conditions have similar slope, and shift linearly down with increasing melt temperature and gas volume. When melt temperature was below 175℃,the critical foaming pressure increased with decreasing melt temperaturc.

Key words: in-line rhcology measurement, slit die, polypropylene, carbon dioxide, critical foaming prcssurc