OPTIMIZATION OF ETHYLENE POLYMERIZATION CONDITIONS WITH METALLOCENE CATALYST USING EXPERIMENTAL DESIGN METHODOLOGY
Abstract:
<p align="justify"> A study of ethylene polymerization was carried out using a 2<sup>3</sup> full factorial design in order to obtain a better understanding of the metallocene catalyst system. Three independent variables (reaction temperature, Al/Zr ratio, and ethylene pressure) were evaluated at two levels. The observed responses were catalytic yield, average molecular weight, polydispersity, melt flow rate, density, melting temperature, enthalpy of fusion, and crystallinity, the yield being of primary interest. The catalyst, co-catalyst and the solvent used were, respectively, Et(Ind)<sub>2</sub>ZrCl<sub>2</sub>, methylaluminoxane (MAO), and n-hexane. The statistical model was efficient in describing the effect of the variables on the yield and showed that the temperature was the variable of larger influence. The results permitted conclusions about the best polymerization conditions </p>
<p align="justify"> A study of ethylene polymerization was carried out using a 2<sup>3</sup> full factorial design in order to obtain a better understanding of the metallocene catalyst system. Three independent variables (reaction temperature, Al/Zr ratio, and ethylene pressure) were evaluated at two levels. The observed responses were catalytic yield, average molecular weight, polydispersity, melt flow rate, density, melting temperature, enthalpy of fusion, and crystallinity, the yield being of primary interest. The catalyst, co-catalyst and the solvent used were, respectively, Et(Ind)<sub>2</sub>ZrCl<sub>2</sub>, methylaluminoxane (MAO), and n-hexane. The statistical model was efficient in describing the effect of the variables on the yield and showed that the temperature was the variable of larger influence. The results permitted conclusions about the best polymerization conditions </p>
DOI: 10.48141/SBJCHEM.v8.n9.2000.28_2000.pdf
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