Kinetic modeling of ethylene-norbornene copolymerization using homogeneous metallocene catalysts

Seung Young Park, Kyu Yong Choi, Kwang Ho Song, Boong Goon Jeong

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The kinetics of ethylene-norbornene copolymerization to cyclic olefin copolymer has been investigated using homogeneous rac-Et(1-indenyl)2ZrCl2/methylaluminoxane catalyst in toluene at 70°C for norbornene/ethylene mole ratios in the range of 3-55. It is shown that the catalyst is ineffective for the homopolymerization of norbornene, but the catalyst activity for the insertion of norbornene into a growing polymer chain increases dramatically in the presence of ethylene. A terminal model has been developed to quantify the kinetic behavior of the copolymerization process, but it was found inadequate to represent the copolymerization kinetics for a broad range of polymerization conditions. To overcome the limitations of the terminal model we developed a penultimate model and excellent agreement between the experimental data and model calculations has been obtained. In particular, it is shown that the penultimate model accurately predicts the effect of bulk phase norbornene concentrations on the polymerization rate.

Original languageEnglish
Pages (from-to)4216-4225
Number of pages10
JournalMacromolecules
Volume36
Issue number11
DOIs
Publication statusPublished - 2003 Jun 3
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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