✦ LIBER ✦

Kinetic study of olefin polymerization with a supported metallocene catalyst. IV. Comparison of bridged and unbridged catalyst in gas phase

✍ Scribed by S. Chakravarti; W. Harmon Ray; Simon X. Zhang

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 267 KB
Volume: 81
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1571

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A kinetic study of ethylene/1‐hexene (E/1‐H) copolymerization is conducted with a supported bridged metallocene catalyst in a gas phase reactor. The investigation into the kinetics of ethylene/1‐hexene copolymerization includes the effects of operational parameters such as the reaction temperature, pressure, and comonomer concentration. On‐line perturbation techniques are implemented to determine key kinetic parameters such as the activation energies for propagation and catalyst deactivation. A comparison of the kinetic parameters and behavior is made between the bridged and a previously studied unbridged catalyst. Finally, a two‐site model is proposed to explain the observed kinetic behavior with changing reaction temperature and comonomer concentration. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 1451–1459, 2001

📜 SIMILAR VOLUMES

Kinetic study of olefin polymerization w

Kinetic study of olefin polymerization with a supported metallocene catalyst. III. Ethylene homopolymerization in slurry

✍ S. Chakravarti; W. Harmon Ray 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 439 KB

## Abstract A kinetic study of ethylene homopolymerization is conducted with a supported unbridged metallocene catalyst in a slurry reactor. The effects of operational parameters such as the reaction temperature and pressure on kinetics are investigated. The kinetic parameters which have been deter

Kinetic study of gas phase olefin polyme

Kinetic study of gas phase olefin polymerization with a TiCl4/MgCl2 catalyst I. Effect of polymerization conditions

✍ G. C. Han-Adebekun; M. Hamba; W. H. Ray 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 281 KB 👁 2 views

This study focuses on the kinetics of ethylene/propylene (homo/co)polymerization reactions using a high activity TiCl 4 /MgCl 2 /AlEt 3 catalyst. The reactor system is a gas phase reactor equipped with an on-line composition control scheme. As such, important kinetic data such as the instantaneous r

Kinetic study of gas phase olefin polyme

Kinetic study of gas phase olefin polymerization with a TiCl4/MgCl2 catalyst. II. Kinetic parameter estimation and model building

✍ M. Hamba; G. C. Han-Adebekun; W. H. Ray 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 455 KB 👁 2 views

Monomer transport and polymerization kinetics are two key phenomena in olefin polymerization with heterogeneous transition metal catalysts. To have a better understanding of these interrelated kinetics and diffusion phenomena, a quantitative calculation of the monomer diffusion directly from experim