中国塑料 ›› 2011, Vol. 25 ›› Issue (02): 108-111 .DOI: 10.19491/j.issn.1001-9278.2011.02.021

• 机械与模具 • 上一篇    

螺杆组合对PP/PET共混体系混合效果影响的研究

王文飞 罗兵 毕超 袁捷朝 谢兆兴   

  1. 北京化工大学机电工程学院 北京化工大学机电工程学院
  • 收稿日期:2010-09-13 修回日期:1900-01-01 出版日期:2011-02-26 发布日期:2011-02-26

Mixing Effect of Screw Configuration on the PP/PET Blends

  

  • Received:2010-09-13 Revised:1900-01-01 Online:2011-02-26 Published:2011-02-26

摘要: 对啮合同向双螺杆挤出机捏合块的2种组合进行了流场模拟和统计学分析。通过对2种组合在不同转速下的模拟,计算了流道内停留时间分布、最大剪切速率分布以及累积应变分布,并对分析结果进行了分析和实验研究。结果表明,分散型构型获得的聚丙烯/聚对苯二甲酸乙二醇酯(PP/PET)共混体系的拉伸强度较好;PP/PET共混体系中PET粒径大小影响冲击强度,PET粒径过小会降低冲击强度。

关键词: 啮合同向双螺杆挤出机, 数值模拟, 螺杆组合, 聚丙烯, 聚对苯二甲酸乙二醇酯, 共混体系

Abstract: Statistic analysis was applied on the flow field of two configurations of kneading blocks. Based on the flow field simulation of the two configurations in different rotational speeds, simulated the maximum shear rate distribution, RTD and strain distribution. Meanwhile an experiment was made to validate the analysis result. Results showed that the dispersive configuration made the tensile strength of PP/PET blend better. The diameters of PET particles affect the impact strength in the PP/PET blend. Too small diameters of PET particles made low impact strength.

Key words: meshing twin screw extruder, numerical analysis, screw configuration, polypropylene, polyethylene terephthalate, blend