Synthesis, characterization and crystallization kinetics of nanocomposites prepared by in situ polymerization of ethylene and graphene

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• 作者：Farrukh Shehzad ; Muhammad Daud…
• 关键词：Polyethylene ; Graphene ; Nanocomposites ; Crystallization ; Kinetics ; Polymerization ; Calorimetry
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：123
• 期：2
• 页码：1501-1511
• 全文大小：3,203 KB
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• 作者单位：Farrukh Shehzad (1)
  Muhammad Daud (1)
  Mamdouh A. Al-Harthi (1) (2)
  
  1. Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, P.O. Box 5050, Dhahran, 31261, Saudi Arabia
  2. Center for Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943

文摘

High-density polyethylene (HDPE)/graphene nanocomposites were synthesized by in situ polymerization. Zriconocene was used as a catalyst and methylaluminoxane as a co-catalyst. The effect of graphene on the activity of the catalyst and on chain microstructure, crystallization kinetics, mechanical and thermal characteristics of HDPE was investigated. Both the thermal and mechanical properties of HDPE were enhanced. The catalyst showed a slight reduction in the activity. The molecular weight of the polymer was analyzed by gel permeation chromatography, and a significant increase in weight-average molecular weight (M _W) of HDPE was observed in the presence of graphene. Isothermal crystallization kinetics was studied by differential scanning calorimetry. The crystallization rate was increased with the addition of graphene. Microcalorimetric analysis indicated a major decrease in the peak decomposition temperature as well as the total heat released for the HDPE/graphene nanocomposites. Keywords Polyethylene Graphene Nanocomposites Crystallization Kinetics Polymerization Calorimetry