Ethylene Polymerization Kinetics and Microstructure of Polyethylenes Made with Supported Metallocene Catalysts

被引：20

作者：

Mehdiabadi, Saeid ^{[1
]}

Lhost, Olivier ^{[2
]}

Vantomme, Aurelien ^{[2
]}

Soares, Joao B. P. ^{[1
]}

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada

[2] Total Res & Technol Feluy, B-7181 Seneffe, Belgium

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2021年 / 60卷 / 27期

关键词：

CHAIN BRANCHING DISTRIBUTION; OLEFIN POLYMERIZATION; ZIEGLER-NATTA; ETHYLENE/1-HEXENE COPOLYMERIZATION; POLYOLEFIN CHAINS; ACTIVE-SITES; PARTICLE; GAS; HOMOPOLYMERIZATION; LENGTH;

D O I：

10.1021/acs.iecr.1c01091

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The microstructure of polyolefins made with a metallocene supported on a porous carrier is generally less homogeneous than when the polyolefin is made with the same unsupported metallocene. For instance, the molecular weight and chemical composition distributions of ethylene/1-olefin copolymers are often broader when they are made with a supported metallocene. In this article, a mathematical model is used to quantify this phenomenon. The polymerization of ethylene was investigated in parallel semi-batch reactors using a metallocene catalyst supported on an inorganic porous carrier. Ethylene pressure, polymerization temperature, and H-2 concentration were the factors changed to study ethylene polymerization kinetics with this catalyst system. Modeling results showed that a three-site model was needed to describe the molecular weight distributions of the polyethylene samples made with this catalyst.

引用

页码：9739 / 9754

页数：16

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