재결정법으로 합성된 TiCl4/MgCl2/THF 촉매의 에틸렌 중합반응 연구Kinetics of Ethylene Polymerization by Coprecipitated TiCl4/MgCl2THF Catalyst

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High activity ethylene polymerization catalysts have been prepared by the reaction of magnesium chloride with titanium tetrachloride in tetrahydrofuran. followed by precipitation with excess n-hexane. The physical properties of catalyst such as surface area and titanium content were measured by BET method and redox titration, respectively. These catalysts were tested with ethylene polymerization reaction in the presence of AlEt3 in the slurry reactor. The activities of prepared catalysts were more than 100kg PE/g·Ti·hr. Kinetic study of ethylene polymerization was performed by varying catalyst concentrations, monomer concentrations, the Al/Ti ratios, polymerization temperatures and hydrogen pressures. The overall polymerization rate was found to be first order with respect to the monomer concentration and the number of active sites. The decay rate of active sites was found to be first order with respect to time. The activation energies of propagation and the decay reaction of active sites were found to be 5.73 and 4.00 kcal/mol, respectively.
Publisher
한국고분자학회
Issue Date
1989-02
Language
Korean
Citation

폴리머, v.13, no.2, pp.147 - 156

ISSN
0379-153X
URI
http://hdl.handle.net/10203/66253
Appears in Collection
CBE-Journal Papers(저널논문)
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