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A Proposed Mechanism for Olefin Polymerization, 1. C 2v , C 2 and C s Zirconocene Catalysts
Author(s) -
Ferreira María Luján
Publication year - 2002
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/1521-3919(20020301)11:3<250::aid-mats250>3.0.co;2-e
Subject(s) - olefin polymerization , olefin fiber , catalysis , monomer , metallocene , polymerization , polymer , mechanism (biology) , polymer chemistry , solvent , chemistry , work (physics) , kinetics , characterization (materials science) , materials science , organic chemistry , thermodynamics , nanotechnology , physics , quantum mechanics
This work presents a proposal for a mechanism of olefin polymerization using metallocenes, taking into account the effect of the counter ion, solvent, and olefin. The Ystenes mechanism is also evaluated for the different symmetries of zirconocenes and for soluble and supported catalysts. The mechanism is related to experimental evidence and analyzed taking into account published results about polymer characterization, kinetic evidence, and other experimental facts. The model tries to give a reasonable explanation for the different dependencies of the kinetics on the monomer: between 1 and 2 for C s and C 2 catalysts and 1 for C 2v .