Metallocene-catalyzed solution polymerization of ethene at elevated pressure

被引：8

作者：

Dornik, HP ^{[1
]}

Luft, G ^{[1
]}

Rau, A ^{[1
]}

Wieczorek, T ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Dept Chem Engn & Macromol Sci, D-64287 Darmstadt, Germany

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2003年 / 288卷 / 07期

关键词：

kinetics (polym.); metallocene catalysts; polyethene;

D O I：

10.1002/mame.200350001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Full Paper: The kinetic of ethene polymerization catalyzed by ((BuCp)-Bu-n)(2)ZrCl2/(AlBu3)-Bu-i/[iMe(2)PhNH](+)[iB(C6F5)(4)](-) has been <LF>investigated at 100 and 140degreesC at pressures from 2 to 7 MPa. The initial polymerization rate R-p0 increases linearly with increasing catalyst concentration, whereas a second-order dependence of R-p0 on the ethene concentration is found the number-average molecular weight (M) over bar (n) increases with increasing ethene pressure (ethene concentration). The relation between (M) over bar (n) and ethene concentration can be explained by an equation based on a kinetic model involving a single center, two-state catalyst system.

引用

页码：558 / 561

页数：4

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