Effect of calcium zirconate nanofiller on Polyethylene productivity and properties
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- 作者：Mamdouh A. Al-Harthi (1)
- 关键词：Polyethylene ; Calcium zirconate ; Insitu polymerization
- 刊名：Journal of Polymer Research
- 出版年：2014
- 出版时间：August 2014
- 年：2014
- 卷：21
- 期：8
- 全文大小：860 KB
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1. Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia - ISSN：1572-8935
文摘
Polyethylene nanocomposites were prepared by in-situ polymerization technique by using highly active metallocene catalyst zirconocene (Cp2ZrCl2) in combination with methylaluminoxane (MAO). The influence of different concentrations (0, 0.6,0.83,1.6 and 2.5 wt.%) of nano calcium zirconate on catalytic activity and polymer properties was investigated. There was a steep increase in the activity of zirconocene catalyst (from 137 to 185?×-0??g-PE/mol?h?bar,) by addition 0.6 wt.% of the nanofiller The results of Differential Scanning Calorimetry (DSC), Crystallization Analysis Fractionation (CRYSTAF) and Wide Angle X-ray Diffraction (WAXD) show that the percentage crystallinity was influenced with respect to the nanofiller concentration. Microcalorimeter was used to study the effect of nanofiller on the pyrolysis of polyethylene. The fibrils morphology appearing on the fractured surface was reduced significantly with the addition of nanofiller as is evident from SEM morphology.