Polyethylene/graphite oxide nanocomposites obtained by in situ polymerization using modified graphite oxide-supported metallocene catalysts

被引：25
作者：
Hu, Zhang [1 ,2 ]
Liu, Chengbin [1 ,2 ]
机构：
[1] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China
来源：
JOURNAL OF POLYMER RESEARCH | 2013年 / 20卷 / 01期
基金：
美国国家科学基金会;
关键词：
Polyethylene; Graphite oxide; Nanocomposite; Metallocene; In situ polymerization; ZIRCONOCENE CATALYSTS; FLAME-RETARDANT; MONTMORILLONITE; NANOSHEET;
D O I：
10.1007/s10965-012-0039-7
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The nanosheet-shaped polyethylene/graphite oxide (PE/GO) nanocomposites were attained by in situ ethylene polymerization using MAO/Cp2ZrCl2 catalyst system supported on the graphite oxides modified with phenylalanine, butylamine, octylamine or 3-aminopropyltriethoxysilane, respectively. The introduction of the organic guests between graphite oxide sheets led to the nanoscale exfoliation and gradual dispersion of GO in the PE matrix during the in situ ethylene polymerization. Morphological examination of the ultimate PE/GO nanocomposites by TEM, SEM, and XRD techniques revealed effective dispersion in nanoscale of GO in PE matrix. In comparison, the traditional phase separated composite was obtained using unmodified GO-supported metallocene catalyst system. The heat endurance of the PE/GO composite is much better than that of polyethylene from homogeneous polymerization.
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页数：8
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