Preparation and characterization of novel polyethylene/carbon nanotubes nanocomposites with core-shell structure

被引:13
|
作者
Liu, Zhi [1 ]
Yu, Mengshan [1 ]
Wang, Jing [1 ]
Li, Fengjiao [1 ]
Cheng, Lu [1 ]
Guo, Jiangping [1 ]
Huang, Qigu [1 ]
Zhou, Yang [1 ]
Zhu, Baichun [2 ]
Yi, Jianjun [2 ]
Liu, Yunfang [1 ]
Yang, Wantai [1 ]
机构
[1] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Key Lab Carbon Fiber & Funct Polymers, State Key Lab Chem Resource Engn,Minist Educ, Beijing 100029, Peoples R China
[2] China Natl Petr Corp, Res Inst Petrochem Technol, Lab Synthet Resin, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
Ziegler-Natta catalyst; Polyethylene; Carbon nanotube; Nanocomposite; Core-shell structure; WALLED CARBON NANOTUBES; SINGLE; CRYSTALLIZATION; POLYMERIZATION; NANOPARTICLES; COMPOSITES; DISPERSION; CATALYSTS; TITANIUM;
D O I
10.1016/j.jiec.2013.08.034
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Preparation of novel polyethylene/carbon nanotubes (CNTs) nanocomposites with core-shell structure was presented. The method involved in situ ethylene polymerization in which nanotube surface was treated with Grignard Agent, followed by reacting with active transition metal compound, TiCl4. The multiwalled carbon nanotubes (MWCNTs) supported catalysts polymerize ethylene to form polymer nanocomposite. MWCNTs were homogeneously dispersed within polymer matrix, and as expected, the resultant nanocomposites featured core-shell structure which was confirmed by HRTEM. For the nanocomposite, the microscopic examination of the cryogenically fractured surface not only ensured a good distribution of carbon nano-particles in the PE matrix but also revealed the ductile-like fracture. The Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) were employed for the study of covalent sidewall functionalization and chemical bonding environment of MWCNTs, also indicated effective immobilization of titanium catalyst on the MWCNTs surface. The crystalline properties, dielectric property and thermal stability of the nanocomposites were determined by WAXD, impedance analyzer and TGA. The dielectric result showed a slight decline of the dielectric constant of the nanocomposites with increase of the polymerization time, and lower dielectric loss was also observed. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:1804 / 1811
页数:8
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