Macromolecular Chemistry and Physics · 1996 · 10 citations · 11 references
Natural SciencesChemical EngineeringChemistryChemical KineticsPolymer ChemistryReaction EngineeringCatalytic Reaction EngineeringCatalytic Reaction KineticsChemical Kinetics ModelingKinetic ModelingPolymerization KineticsPolymerization ProcessesActive SitesCatalyst Active SitesCatalyst KineticsEthylene PolymerizationKinetic Data AnalysisKinetic Modeling Of PolymerizationPolymerization ModelingRate Constants
Abstract A mathematical model of the polymerization process is suggested on the basis of kinetic data, obtained for the polymerization of ethylene with supported titanium‐magnesium catalysts of various compositions differing in particle size, content of electron donor modifier, oxidation state of titanium in the initial catalyst and combination with different cocatalysts. The model includes stages of the formation and deactivation of active sites and takes into account monomer diffusion into the polymer particle. The analysis of experimental data by means of the mathematical model allowed to obtain the rate constants for single stages of the polymerization process. The suggested model and the obtained set of parameters allow to make a satisfactory description of a wide spectrum of experimental data, corresponding to different shapes of kinetic curves. The kinetic parameters were found to depend on the oxidation state of titanium in the catalyst and on the nature of the cocatalyst.
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S. Floyd, Tomi Heiskanen, Timothy Taylor et al. · Journal of Applied Polymer Science · 1987 · 155 citations