中国塑料 ›› 2010, Vol. 24 ›› Issue (05): 68-73 .DOI: 10.19491/j.issn.1001-9278.2010.05.016

• 加工与应用 • 上一篇    下一篇

PP/CaCO3复合发泡材料泡孔形态预测模型的研究

王喜顺 黄松   

  1. 华南理工大学机械与汽车工程学院
  • 收稿日期:2009-11-02 修回日期:2010-03-04 出版日期:2010-05-26 发布日期:2010-05-26

Predicting Model for Bubble Morphology of PP/CaCO3 Foaming Composites

  

  • Received:2009-11-02 Revised:2010-03-04 Online:2010-05-26 Published:2010-05-26

摘要: 用单螺杆挤出装置,以CO2为发泡剂,对聚丙烯(PP)/CaCO3复合材料进行挤出发泡;采用正交法设计实验,利用Design-Expert统计软件对实验数据进行统计处理,观察制品纵截面上泡体的形态变化,从而得到加工工艺参数对泡体形态的影响规律,回归拟合得到泡孔平均直径、面密度、形变程度和倾向角的预测模型,并进行实验验证;最后用回归模型求解出较合适的加工参数范围。结果表明,转速为46~52 r/min、机头温度为170 ℃、熔体温度为180~189 ℃、CaCO3含量为6.67 %~7.9 %时,可得到较好的PP/CaCO3发泡制品。

关键词: 聚丙烯, 碳酸钙, 发泡, 复合材料, 泡孔形态, 预测模型

Abstract: Taking CO2 as a foaming agent, PP/CaCO3 composite was foamed in a single screw extruder. Orthogonal method was used to design the experiment and DOE software was used to count the data. The bubble morphology on the longitudinal surface was analyzed. The impact of the processing parameters on the bubble morphology was found, and the model of average diameter, surface density, deformation, and tendency angle were solved by Design-Expert software and compared with actual experimental data. When screw speed was 42~52 r/min, die temperature was 170 ℃, melt temperature was 180~189 ℃, and content of CaCO3 was 6.67 %~ 7.9 %,the foamed PP/CaCO3 composite showed the best bubble morphology.

Key words: polypropylene, calcium carbonate, foaming, composite, bubble morphology, predicting model