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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/10718

Title: Effects of Ti oxidation state on ethylene, 1-hexene comonomer polymerization by MgCl_2-supported Ziegler–Natta catalysts
Authors: Senso, Nichapat
Praserthdam, Piyasan
Jongsomjit, Bunjerd
Taniike, Toshiaki
Terano, Minoru
Keywords: Ziegler–Natta catalyst
Titanium oxidation state
Ethylene/1-hexene copolymerization
Ethylene polymerization
Issue Date: 2011-08-31
Publisher: Springer
Magazine name: Polymer Bulletin
Volume: 67
Number: 9
Start page: 1979
End page: 1989
DOI: 10.1007/s00289-011-0610-0
Abstract: In this work, the influences of the Ti oxidation state on the catalytic properties of MgCl_2-supported Ziegler–Natta catalysts in ethylene homo- and co-polymerization with 1-hexene. Three catalysts having different Ti oxidation states were synthesized by milling TiCl_4, TiCl_3, or TiCl_2 together with MgCl_2. With these catalysts having different Ti oxidation states, the polymerization conditions such as the Al concentration, temperature, and 1-hexene concentration were varied to figure out their catalytic abilities in ethylene homo- and co-polymerization. The Ti oxidation state affected the catalyst activity largely, having unique dependences on the polymerization conditions. A higher oxidation state led to a higher activity, slightly larger comonomer incorporation, and lower molecular weight as well as its narrower distribution. However, rough characteristics of copolymers were similar among the different Ti oxidation states.
Rights: This is the author-created version of Springer, Nichapat Senso, Piyasan Praserthdam, Bunjerd Jongsomjit, Toshiaki Taniike, Minoru Terano, Polymer Bulletin, 67(9), 2011, 1979-1989. The original publication is available at www.springerlink.com, http://dx.doi.org/10.1007/s00289-011-0610-0
URI: http://hdl.handle.net/10119/10718
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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