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| Preparation of Fe/SiO2/PE Composites Through Polymerization Filling Technique |
Yubin GU,Yong YANG,Zhengliang HUANG( ),Binbo JIANG,Chonglong BAO,Jingdai WANG,Yongrong YANG |
| State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China |
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Cite this article:
Yubin GU,Yong YANG,Zhengliang HUANG,Binbo JIANG,Chonglong BAO,Jingdai WANG,Yongrong YANG. Preparation of Fe/SiO2/PE Composites Through Polymerization Filling Technique. Chinese Journal of Materials Research, 2015, 29(2): 88-94.
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Abstract Fe/SiO2composites were prepared by sol-gel method firstly and further on which zirconcene dichloride (Cp2ZrCl2) was deposited to prepare a catalyst Fe/SiO2/Cp2ZrCl2. Then particulates of Fe/SiO2/PE composites were produced by polymerization filling technique with ethylene and the Fe/SiO2/Cp2ZrCl2 catalysit. The obtained Fe/SiO2/PE composite particles were characterized by scanning electron microscopy(SEM), energy dispersive X-ray spectroscopy(EDX), infrared spectroscopy(IFR), inductively coupled plasma spectroscopy(ICP), thermal gravimetric analysis(TGA) and laser particle size analyzer, respectively. The results show that the Fe core was perfectly coated by a SiO2 layer for the Fe/SiO2 composites, which could act well as a supporter for the deposition of Cp2ZrCl2. The Fe/SiO2/Cp2ZrCl2 catalyst showed a high activity for the ethylene polymerization process. PE chains grew and attached on the Fe/SiO2/Cp2ZrCl2 composites gradually, until the Fe/SiO2 composites were entirely coated. Moreover, the Fe/SiO2/PE particles were found to agglomerate significantly during ethylene polymerization. Both the Fe/SiO2/Cp2ZrCl2 catalysts and Fe/SiO2/PE composites had irregular shapes, and the latter tended to duplicate the shape of the former. The Fe content in the Fe/SiO2/PE composites can be adjusted by varying the time and pressure of the polymerization process. Finally, the range of the molecular mass distribution of the PEs produced by this process is narrow.
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Received: 17 July 2014
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| Fund: *Supported by National Natural Science Foundation of China No.21406194, Specialized Research Fund for the Doctoral Program of High Education No.20130101110063, National Program on Key Basic Research Project No.2012CB720500, Zhejiang Provincial Natural Science Foundation of China No.LQ13B060002. |
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