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CLC number: O632.12, TQ032.4

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Received: 2001-10-18

Revision Accepted: 2002-01-02

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Journal of Zhejiang University SCIENCE A 2002 Vol.3 No.2 P.148~150

http://doi.org/10.1631/jzus.2002.0148


Ethylene polymerization with novel silicon bridged homo-dinuclear cyanoethyl cyclopentadienyl complexes of titanium and zirconium


Author(s):  SUN Jun-quan, LIANG Cheng-feng, YANG Yong-rong, Schumann H.

Affiliation(s):  College of Material and Chemical Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   sjunquan@yahoo.com

Key Words:  Homo-dinuclear catalyst, Titanocene, Zirconocene, Polyethylene, Chemical engineering


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SUN Jun-quan, LIANG Cheng-feng, YANG Yong-rong, Schumann H.. Ethylene polymerization with novel silicon bridged homo-dinuclear cyanoethyl cyclopentadienyl complexes of titanium and zirconium[J]. Journal of Zhejiang University Science A, 2002, 3(2): 148~150.

@article{title="Ethylene polymerization with novel silicon bridged homo-dinuclear cyanoethyl cyclopentadienyl complexes of titanium and zirconium",
author="SUN Jun-quan, LIANG Cheng-feng, YANG Yong-rong, Schumann H.",
journal="Journal of Zhejiang University Science A",
volume="3",
number="2",
pages="148~150",
year="2002",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2002.0148"
}

%0 Journal Article
%T Ethylene polymerization with novel silicon bridged homo-dinuclear cyanoethyl cyclopentadienyl complexes of titanium and zirconium
%A SUN Jun-quan
%A LIANG Cheng-feng
%A YANG Yong-rong
%A Schumann H.
%J Journal of Zhejiang University SCIENCE A
%V 3
%N 2
%P 148~150
%@ 1869-1951
%D 2002
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2002.0148

TY - JOUR
T1 - Ethylene polymerization with novel silicon bridged homo-dinuclear cyanoethyl cyclopentadienyl complexes of titanium and zirconium
A1 - SUN Jun-quan
A1 - LIANG Cheng-feng
A1 - YANG Yong-rong
A1 - Schumann H.
J0 - Journal of Zhejiang University Science A
VL - 3
IS - 2
SP - 148
EP - 150
%@ 1869-1951
Y1 - 2002
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2002.0148


Abstract: 
Novel homo-dinuclear silicon bridged cyanoethyl cyclopentadienyl complexes of titanium and zirconium (CH3)2Si((η5−C5H3CH2CH2CN)(C5H5)MCl2)2 (M=Ti(1), Zr(2)) were synthesized and developed for the polymerization of ethylene. Compared with their corresponding mononuclear complexes (η5−C5H4CH2CH2CN)(C5H5)MCl2 (M=Ti(3), Zr(4)), the dinuclear complexes had higher catalytic activity. And the polyethylene produced had a higher molecular weight than that obtained K7with mononuclear catalysts. Effects of conditions on the ethylene polymerization catalyzed by (2)/MAO (methylaluminoxane) were studied in detail. The catalyst showed a very high activity (>106 g PE/mol Zr·h) under low catalyst concentration and high molar ratio of Al/Zr.

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Reference

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[2] Brintzinger, H. H., Fischer, D., M

[3] Donald, R. L., David H. M., 2001. Mixed catalyst compounds, catalyst systems and their use in a polymerization process, United States Patent Application No.20010031695

[4] Francis, P. S., Cooke, R. C. Jr., Elliott, J. H., 1958. Fraction of polyethylene. Journal of Polym. Sci., 31: 453-466

[5] Kaminsky, W., 2001. New materials by polymerization of olefins and styrene by metallocene/MAO catalysts. Journal of Zhejiang University SCIENCE, 2(1): 1-8.

[6] Liang Chengfeng, Sun Junquan, Yang Yongrong, 2001. Cyanoethyl substituted cyclopentadienyl complex of titanium: synthesis, structure and catalytic character in ethylene polymerization. Proc. of the 8th International SPACC Syposium, Beijing, China, p.26-27.

[7] Mitani,M., Hayakawa,M., Yamada, T. et al., 1996. Novel zirconium-iron multinuclear complex catalysts for olefin polymerizations. Bulletin of Chem. Soc. Jpn., 69(10): 2967-2976.

[8] Soga, K., Ban, H.T., Uozumi, T., 1998. Synthesis of a dinuclear ansa-zirconocene catalyst having a biphenyl bridge and application to ethene polymerization. Journal of Mol. Cat., 128: 273-278

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