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Effect of silane-modified silica/MAO-supported Et[Ind]2ZrCl2 metallocene catalyst on copolymerization of ethylene |
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| Authors: | Bunjerd Jongsomjit Paninee Kaewkrajang Piyasan Praserthdam |
| Affiliation: | Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand |
| Abstract: | Effect of SiCl4-modified silica/MAO-supported Et[Ind]2ZrCl2 metallocene catalyst on copolymerization of ethylene with -olefins was investigated. Effect of SiCl4 on activities was diminished with higher -olefins. Molecular weights of copolymers decreased with SiCl4 modification. SiCl4 modification also resulted in a lower molecular weight distribution. 13C NMR showed that ethylene incorporation in all systems gave copolymers with similar triad distribution. In addition, a narrow branching distribution can be achieved with SiCl4 modification. |
| Keywords: | Copolymerization Metallocene catalyst Polyethylene Silica Support |
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