A new strategy to prepare polyethylene nanocomposites by using a late-transition-metal catalyst supported on AlEt3-activated organoclay

作者：He, Fu An; Zhang, Li Ming^*; Jiang, Hong Liu; Chen, Li Shan; Wu, Qing; Wang, Hai Hua

来源：Composites Science and Technology, 2007, 67(7-8): 1727-1733.

DOI：10.1016/j.compscitech.2006.06.012

• polyethylene
• organoclay
• nanocomposites
• supported catalyst
• in situ polymerization

A new strategy for in situ polymerization was developed to prepare the polyethylene nanocomposites, in which a nickel alpha-diimine late-transition-metal catalyst supported on the AlEt3-activated organoclay was adopted to initiate the ethylene polymerization and to provide the reinforcement materials after the polymerization. It was found that the polymerization conditions such as reaction time, Al/Ni molar ratio, and reaction temperature affected the polymerization activity and the clay loading. The nanoscale dispersion of the clay layers in the polyethylene matrix was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). From the thermogravimetric analyses (TGA), it was found that the decomposition temperature of the nanocomposite with the organoclay of 11.91 wt% could be 46.8 degrees C higher than that of pure polyethylene when 30% weight loss was selected as a measuring point, showing enhanced thermal oxidation stability of this kind of polyolefin nanocomposites.

• 出版日期2007-6
• 单位中山大学