高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (4): 633.

• 论文 • 上一篇    下一篇

HDPE/PP共混物在振动剪切作用下的力学性能与形态控制

张弓, 傅强, 申开智, 蒋龙   

  1. 四川大学高分子材料科学与工程系, 成都 610065
  • 收稿日期:1999-02-02 出版日期:2000-04-24 发布日期:2000-04-24
  • 通讯作者: 傅强(1963年出生),男,博士,教授,从事高分子共混改性研究.
  • 基金资助:

    国家自然科学基金(批准号:59773025);香港蒋氏工业慈善基金(批准号:RC96105)

The Morphology Control and Mechanical Properties of High Density Polyethylene and Polypropylene Blend Under Oscillating Shear Stress Field

ZHANG Gong, FU Qiang, SHEN Kai-Zhi, JIANG Long   

  1. Department of Polymer Material Science and Engineering, Sichuan University, Chengdu 610065, China
  • Received:1999-02-02 Online:2000-04-24 Published:2000-04-24

PDF (PC)

被引次数

32

摘要： 采用高剪切引起的相容与振动剪切保压方式控制共混物的形态,结果表明,当共混体系中HDPE/PP为92/8时的试样拉伸强度为97.1MPa,而80/20试样的缺口冲击强度为45.5kJ/m2,较静态试样分别提高4.3倍和9.5倍.采用振动剪切注射技术可以针对某一组分获得高强度、高韧性的HDPE/PP共混制件.

关键词: 振动剪切注射, 高密度聚乙烯, 聚丙烯, 共混

Abstract: The improvement of mechanical properties of high density polyethylene(HDPE) and polypropylene(PP) blend was studied by controlling the phase miscibility vs. phase separation. Because the phase morphology and crystal morphology compete with each other, it is difficult to control the degree of the micro phase separation in an ordinary way, but with the special method of oscillating packing injection molding at a low pressure, the fine structure combined with micro phase separation and phase morphology which was studied with SEMmethod can be controlled to a certain extent. The high tensile strength and high toughness of HDPE/PPblends were got within the PPcontent in the range from 5% to 20%. The key properties of the blend were as follows: tensile strength and notched impact strength of HDPE/PP(92/8) blend specimens in the oscillating packing are 97.1 MPa and 45.5 kJ/m2, 4.3 times and 9.5 times of the static packing specimens respectively.

Key words: Oscillating packing injection, HDPE, Polypropylene, Blend

中图分类号: 

TrendMD: