Characterization of polyethylene/kaolin composites by polymerization filling with Cp2ZrCl2/MAO catalyst system

Authors

  • Xin Wang,

    1. State Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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  • Qiye Wu,

    Corresponding author
    1. Qingdao Institute of Chemical Technology, Qingdao 266042, China
    • Qingdao Institute of Chemical Technology, Qingdao 266042, China
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  • Jinyong Dong,

    1. College of Earth and Mineral Science, Pennsylvania State University, University Park, Pennsylvania 16802-3000
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  • Youliang Hu,

    1. State Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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  • Zongneng Qi

    1. State Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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Abstract

In this work, the preparation and characterization of metallocene-catalyzed polyethylene (PE)/kaolin composites were presented. The composites was prepared by the so-called polymerization-filling method in which the PE matrix was formed directly on the kaolin surface by ethylene polymerization with the prefixed Cp2ZrCl2/methylaluminoxane (MAO) catalyst system on the kaolin surface. SEM, FTIR, and DMA were carried out to characterize the composites. The experimental results showed the new composites had homogeneous distribution of kaolin particles in the PE matrix and strong interfacial interaction between the PE matrix and kaolin particles. At the molecular level, the interfacial interaction caused the decrease of the mobility of PE molecular chains. In addition rheological testing showed that the introduction of kaolin by polymerization filling could improve the rheological behavior of prepared composites. The relationship between the rheological behaviors and the interfacial conditions were discussed. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2913–2921, 2002

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