Comparison of Activity of Ziegler-Natta Catalysts Prepared by Recrystallization and Chemical Reaction Methods towards Polymerization of Ethylene

  • Piyavit Pokasermsong Chulalongkorn University
  • Piyasan Praserthdam Chulalongkorn University
Keywords: Ziegler-Natta catalyst, support catalyst, ethylene polymerization.

Abstract

In the present study, Ziegler-Natta catalysts were prepared on supports that were synthesized via two different methods. The first method (method A) is called the recrystallization method, which employed MgCl2 as a precursor. The second method (method B) is called chemical reaction method, which employed Mg(OEt)2 as a precursor. The catalysts were characterized by XRD, TGA, ESR and nitrogen physisorption. BET specific surface areas of catalyst A and B were 123.1 and 142.2 m2/g, respectively. Polymerization of ethylene was carried out over the catalyst and triethylaluminium. The catalyst prepared by method A exhibited higher activity than that prepared by method B. However, the properties of polymer obtained from both catalysts were similar. The results from XRD and TGA analyses confirmed that Mg(OEt)2 was converted to MgCl2.

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Author Biographies

Piyavit Pokasermsong

Center of Excellence on Catalysis and Catalytic Reaction Engineering Department of Chemical Engineering, Faculty of Engineering Chulalongkorn University, Bangkok 10330, Thailand

Piyasan Praserthdam

Center of Excellence on Catalysis and Catalytic Reaction Engineering Department of Chemical Engineering, Faculty of Engineering Chulalongkorn University, Bangkok 10330, Thailand

Published In
Vol 13 No 1, Feb 18, 2009
How to Cite
[1]
P. Pokasermsong and P. Praserthdam, “Comparison of Activity of Ziegler-Natta Catalysts Prepared by Recrystallization and Chemical Reaction Methods towards Polymerization of Ethylene”, Eng. J., vol. 13, no. 1, pp. 57-64, Feb. 2009.

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