Article ID Journal Published Year Pages File Type
822665 Composites Science and Technology 2007 7 Pages PDF
Abstract

A new strategy for in situ polymerization was developed to prepare the polyethylene nanocomposites, in which a nickel α-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 °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.

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Physical Sciences and Engineering Engineering Engineering (General)
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