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Characteristics of Copolymerization of Ethylene/1-Octene with rac-Me2Si(2-p-tolylindenyl)2ZrCl2 Catalyst  

Ahn, Sung-Hyun (Division of Materials and Chemical Engineering, Hanyang University)
Park, Yeung-Ho (Division of Materials and Chemical Engineering, Hanyang University)
Publication Information
Applied Chemistry for Engineering / v.18, no.5, 2007 , pp. 516-521 More about this Journal
Abstract
The copolymerization characteristics of a newly-synthesized catalyst, $rac-Me_2Si(2-p-tolylindenyl)_2ZrCl_2$, and its analogue, $rac-Me_2Si(Ind)_2ZrCl_2$, were examined in the ethylene/1-octene copolymerization while varying the concentration of 1-octene in the reaction mixture. The activity of $rac-Me_2Si(2-p-tolylindenyl)_2ZrCl_2$ catalyst was decreased with increase of comonomer concentration, which is different from the usual comonomer effect of the metallocene catalysts with a bridge structure. The contents of 1-octene in the copolymer from the catalyst with 2-p-tolyl substituent were higher than those from the catalyst without that substituent. The melting point, crystallinity, and molecular weight decreased with comonomer content which was more apparent for $rac-Me_2Si(2-p-tolylindenyl)_2ZrCl_2$ catalyst.
Keywords
$rac-Me_2Si(2-p-tolylindenyl)_2ZrCl_2$ catalyst; metallocene catalyst; ethylene/1-octene copolymerization; comonomer effect; 2-p-tolyl substituent;
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  • Reference
1 J. Koivumaki and J. V. Seppala, Macromolecules, 26, 5535 (1993)
2 R. Quijada, J. Dupont, M. S. L. Miranda, R. B. Scipioni, and G. B. Galland, Macromol. Chem. Phys., 196, 3991 (1995)   DOI   ScienceOn
3 M. J. Schneider, J. Suhm, R. Mûlhaupt, M. H. Prosenc, and H. H. Brintzinger, Macromolecules, 30, 3164 (1997)
4 S. C. Yoon, J. W. Park, H. S. Jung, H. J. Song, J. T. Park, and S. I. Woo, J. Organomet. Chem., 559, 149 (1998)
5 S. C. Yoon, T. K. Han, B. W. Woo, H. J. Song, S. I. Woo, and J. T. Park, J. Organomet. Chem., 534, 81 (1997)
6 C. Przybyla, B. Tesche, and G. Fink, Macromol. Rapid Commun., 20, 328 (1999)
7 J. C. W. Chien and T. Nozaki, J. Polym. Sci., Part A:Polym. Chem., 31, 227 (1993)
8 H. H. Brintzinger, D. Fischer, R. Mûlhaupt, B. Rieger, and R. M. Waymouth, Angew. Chem. Int. Ed. Engl., 34, 1143 (1995)
9 J. Koivumaki and J. V. Seppala, Polymer, 34, 1958 (1993)
10 J. Suhm, M. J. Schneider, and M. Mûlhaupt, J. Mol. Catal. A. Chem., 128, 215 (1998)
11 S. E. Reybuck, A. Meyer, and R. M. Waymouth, Macromolecules, 35, 637 (2002)   DOI   ScienceOn
12 M. D. F. V. Marques, A. Conte, F. C. D. Resende, and E. G. Chaves, J. Appl. Polym. Sci., 82, 724 (2001)   DOI   ScienceOn
13 K. Soga, H. Yanagihara, and D. H. Lee, Makromol. Chem., 190, 995 (1989)   DOI
14 I. Kim, S. Y. Kim, and C. S. Choi, Korean Polym. J., 7, 162 (1999)
15 Z. Q. Fan, T. Yasin, and L. X. Feng, J. Polym. Sci. A, 38, 4299 (2000)   DOI   ScienceOn
16 N. Herfert, P. Montag, and G. Fink, Makromol. Chem., 194, 3167 (1993)   DOI
17 J. C. Randall, J. M. S-Rev. Macromol. Chem. Phys. C29, 201 (1989)
18 M. Miri, D. Hetzer, A. Miles, M. Pecak, and B. Riscili, in: W. Kaminsky (Ed.), Metalorganic Catalysts for Synthesis and Polymerisation, Springer-Verlag, Berlin, p. 509 (1999)
19 J. Huang and G. L. Rempel, Prog. Polym. Sci., 20, 459 (1995)