中国塑料 ›› 2011, Vol. 25 ›› Issue (01): 51-54 .DOI: 10.19491/j.issn.1001-9278.2011.01.012

• 材料与性能 • 上一篇    下一篇

PE-LD/CaCO3/EVA复合材料性能的研究

董金虎   

  1. 陕西理工学院
  • 收稿日期:2010-08-05 修回日期:2010-11-06 出版日期:2011-01-26 发布日期:2011-01-26

Study on Properties of PE-LD/CaCO3/EVA Composites

DONG Jinhu   

  • Received:2010-08-05 Revised:2010-11-06 Online:2011-01-26 Published:2011-01-26
  • Contact: DONG Jinhu

摘要: 分别探讨了重质碳酸钙(CaCO3)和乙烯-醋酸乙烯共聚物(EVA)的含量对低密度聚乙烯(PE-LD)/CaCO3/EVA三元复合体系的拉伸强度、断裂伸长率、冲击强度以及缺口冲击强度的影响,并结合试样冲击断面的扫描电镜照片,分析了复合材料力学性能变化的规律和原因。结果表明,当重质CaCO3含量为10 %~20 % 、EVA含量为0.67 %时,复合材料的力学性能最佳;当重质CaCO3含量为20 %时,EVA含量增加到1.33 %~2.33 %时,复合材料中树脂基体形成的网状结构趋于完善,冲击强度达到最大值,而拉伸强度随EVA含量的增加变化不大。

关键词: 碳酸钙, 低密度聚乙烯, 乙烯-醋酸乙烯酯共聚物, 复合材料, 力学性能, 网状结构

Abstract: The effects of CaCO3 and EVA on the mechanical properties of low density polyethylene/calcium carbonate/ethylene-vinylacetate copolymer (PE-LD/CaCO3/EVA) composites were studied, and the reason was explained combined with scanning electron microscope observation of the fractured surface. It showed that when the content of EVA was 0.67 % and the content of CaCO3 between 10 % and 20 %, the mechanical properties of the composites were the best. And when the content of CaCO3 was 20 % and the content of EVA between 1.33 % and 2.33 %, the toughness increased to a maximum, and the tensile strength changed slightly with the increasing content of EVA.

Key words: calcium carbonate, low density polyethylene, ethylene-vinylacetate copolymer, composite, mechanical property, netlike structure