Synthesis of Octahedral Zirconium Complex Bearing [NHC-O] Ligands, and Its Behavior as Catalyst in the Polymerization of Olefins

被引：32

作者：

Bocchino, Carmen ^{[1
]}

Napoli, Mariagrazia ^{[1
]}

Costabile, Chiara ^{[1
]}

Longo, Pasquale ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Chim, I-84084 Fisciano, SA, Italy

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2011年 / 49卷 / 04期

关键词：

isotactic; poly(propylene); polyethylene; zirconium catalyst; HETEROCYCLIC CARBENE COMPLEXES; CHELATING DIAMIDE COMPLEXES; TITANIUM COMPLEXES; ALPHA-OLEFINS; LIVING POLYMERIZATION; N; N-CHELATE LIGANDS; POST-METALLOCENES; ETHYLENE; CHROMIUM; CYCLOPOLYMERIZATION;

D O I：

10.1002/pola.24495

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The synthesis and characterization of a zirconium complex, having two alkoxide functionalized N-heterocyclic carbene ligands, and its behavior as catalyst in the polymerization of ethylene and propylene, have been reported. NMR analysis showed that more than one species was obtained during synthesis. These data were confirmed by ethylene polymerization that gave rise to a linear polyethylene having a high Molecular weight and a polydispersity index (MDI) > 2 and often bimodal. The same catalytic system was able to produce highly isotactic polypropylene together with an atactic fraction. OFT studies on the complex stereoisomer stability gave indications on the species possibly involved in the polymerizations. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 862-870, 2011

引用

页码：862 / 870

页数：9

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