中国塑料 ›› 2009, Vol. 23 ›› Issue (08): 53-60 .DOI: 10.19491/j.issn.1001-9278.2009.08.012

• 材料与性能 • 上一篇    下一篇

高密度聚乙烯/纳米黏土复合材料的结晶行为研究

陈斌艺 王向东 张玉霞   

  1. 北京工商大学材料系 北京工商大学材料科学与工程系 北京工商大学
  • 收稿日期:2009-06-11 修回日期:1900-01-01 出版日期:2009-08-26 发布日期:2009-08-26

Study on crystallization behaviors of polyethylene/clay nanocomposites

WANG Xiang-dong Yuxia Zhang   

  • Received:2009-06-11 Revised:1900-01-01 Online:2009-08-26 Published:2009-08-26

摘要: 通过熔融插层法制备高密度聚乙烯/纳米黏土复合材料,采用差示扫描量热仪测试材料在不同冷却速率下的结晶性能,并通过Avrami方法、Ozawa方法和莫志深方法等方法研究其结晶行为。研究发现,纳米黏土的加入,可提高高密度聚乙烯的结晶温度、熔融温度和结晶度。非等温结晶动力学研究得到纳米黏土复合材料的 等结晶参数值表明纳米黏土复合材料可起促进成核,加速结晶作用。通过POM观察也证实高密度聚乙烯/纳米黏土复合材料比高密度聚乙烯更好的成核和结晶,结晶形态中晶粒尺寸变小,晶粒密度增大。可认为纳米黏土与高密度聚乙烯之间形成插层结构,增强其相互作用,利于结晶运动中链段排列。

关键词: 高密度聚乙烯, 纳米黏土, 结晶动力学

Abstract:

In this article, high density polyethylene/clay nanocomposites were prepared via melt intercalation. The crystallization behavior was investigated uisng differential scanning calorimetry (DSC) at various cooling rates. Avrami, Ozawa, and Mo methods were applied to describe the crystallization process under nonisothermal conditions. The crystallization temperature, melting temperature, and crystallinity of nano-composites were found higher than those of neat PE-HD. The values of t1/2, , and showed that clay played a role of heterogeneous nucleating agent and accelerated the crystallization process of PE-HD, which could be attributed to the "intercalation" structure formed between PE-HD and clay.

Key words: PEHD, Nano-Clay, crystallization kinetics

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