Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (9): 86-89.

• Materials Science & Technology • Previous Articles     Next Articles

Die-Swell Behavior of PP/HGB Composite Melt

Liang Ji-zhao  Zhong Ming-qiang   

  1. School of Industrial Equipment and Control Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-03-21 Online:2006-09-25 Published:2006-09-25
  • Contact: 梁基照(1953-)，男，博士，教授，博士生导师，主要从事聚合物复合材料及加工研究 E-mail:scutjzl@sohu.com
  • About author:梁基照(1953-)，男，博士，教授，博士生导师，主要从事聚合物复合材料及加工研究

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Abstract:

The die-swell behavior of the PP(polypropylene)filled with HGB(Hollow Glass Bead),namely of the PP/HGB composite．was investigated using a XNR-400A melt flow indexer at 1 90 to 230 ℃ with the load of 1.0 to 8.0 kg.The results show that the die-swell ratio B of the melt linearly increases with the shear stress at 200 ℃,that the die-swell ratio presents a approximately linear decrease with the increase in temperature at a load of 3.80 kg,that the die-swell ratio nonlinearly decreases with the increase in the volume fraction( Φf)of HGB at 1 90 ℃,and that,when Φf=1 0% and P=3.80 kg,the die-swell ratio increases with the HGB diameter.

Key words: polypropylene, hollow glass bead, composite, die-swell