𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Copolymerization of ethylene and α-olefins with combined metallocene catalysts. II. Mathematical modeling of polymerization with single metallocene catalysts

✍ Scribed by Jung Dae Kim; João B. P. Soares


Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
202 KB
Volume
38
Category
Article
ISSN
0887-624X

No coin nor oath required. For personal study only.

✦ Synopsis


The relation between the polymerization conditions and the distributions of molecular weight (MWD) and chemical composition (CCD) of poly(ethylene-co-1-hexene) made with single supported metallocene catalysts was investigated. Understanding the behavior of each metallocene under different polymerization conditions is necessary for designing combined metallocene catalysts to produce tailor-made polyolefins. In this article, a simple mathematical model based on experimental results is developed and combined with the bimodality criterion developed in Part I of this series to predict polymerization conditions and metallocene combinations that will produce polymers with desired MWDs and CCDs.


📜 SIMILAR VOLUMES


Copolymerization of ethylene and α-olefi
✍ Jung Dae Kim; João B. P. Soares 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 143 KB

The distributions of the molecular weight (MWD) and chemical composition of polyolefins can be controlled by the combination of two or more metallocenes from the knowledge of the behavior of each individual metallocene. Polyolefins with bimodal MWDs and a higher comonomer content in high molecular w

Copolymerization of ethylene and α-olefi
✍ João B. P. Soares; J. D. Kim 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 224 KB

Metallocene and other single-site catalysts can be combined to produce polyolefins with broadened distributions of molecular weight, chemical composition, and long-chain branching. These resins are finding increasing applications because of their enhanced properties compared to ones made with conven

Polymerization behavior of α-olefins wit
✍ Naofumi Naga; Takeshi Shiono; Tomiki Ikeda 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 101 KB

Polymerizations of propene, 1-butene and 1-hexene were conducted with a mixture of rac-and meso- [dimethylsilylenebis(2-methylindenyl)]zirconium dichloride (1) combined with methylaluminoxane (MAO), triethylaluminium (AlEt 3 )/triphenylcarbenium tetrakis(pentafluorophenyl)borate (2) or triisobutylal

Continuous solution copolymerization of
✍ Wen-Jun Wang; Edward Kolodka; Shiping Zhu; Archie E. Hamielec 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 200 KB 👁 2 views

The solution copolymerization of ethylene (1) with octene-1 (2) in Isopar E using constrained geometry catalyst system, [C 5 Me 4 (SiMe 2 N t Bu)]TiMe 2 (CGC-Ti)/ tris(pentafluorophenyl)boron (TPFPB)/modified methylaluminoxane (MMAO), has been carried out in a high-temperature, high-pressure continu

Copolymerization of ethylene and 1-hexen
✍ Jung Dae Kim; João B. P. Soares 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 53 KB 👁 2 views

The effect of different catalyst support treatments in the 1-hexene/ethylene copolymerization with supported metallocene catalysts was investigated through the analysis of molecular weight and chemical composition distributions by means of high temperature gel permeation chromatography (GPC) and cry

Kinetic study of olefin polymerization w
✍ S. Chakravarti; W. Harmon Ray 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 439 KB 👁 1 views

## 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