摘要
采用超声分散溶液混合法制备出多壁碳纳米管（MWNTs）／高密度聚乙烯（HDPE）复合材料。通过场发射电镜观察了MWNTs在HDPE基体中的分散，采用x射线衍射（XRD）分析和差示扫描量热（DSC）分析研究了含碳纳米管的高密度聚乙烯的晶态结构和结晶行为，并利用Avrami方程描述了复合材料的等温结晶动力学。结果表明，MWNTs可以较好地分散在HDPE基体中并且作为一种有效的成核剂，用量较少（1％）和直径较大（60～100nm）的MWNTs成核效果更明显；它们并没有改变HDPE的晶型；随着MWNTs含量的增加和温度的升高，MWNTs／HDPE复合材料中HDPE主要是通过异相成核以球晶生长方式结晶的。
MWNTs/HDPE composites were prepared by solution blending and ultrasonic dispersion. FESEM micrograph showed the dispersion of MWNTs in HDPE matrix. The crystalline structure and the crystallization behavior of the MWNTs/HDPE composite were analyzed by XRD and DSC. Isothermal crystallization kinetics of the composite was described by Avrami equation. The results demonstrated that MWNTs could well distribute in HDPE and serve as effective nucleating agents; MWNTs with the less content （ 1 wt% ） and the larger diameter （60- 100 nm） had more remarkable effect on nucleation; They did not change the HDPE crystal form; With the increase of MWNTs content and temperature, HDPE in the composite grew into crystals in a pattern of spherulite through heterogeneous nucleation.
出处
《塑料工业》
CAS
CSCD
北大核心
2011年第2期63-67,86,共6页
China Plastics Industry
基金
教育部留学归国人员科研启动基金
