Ethylene/1-Hexene Copolymerization over Different Phases Titania-Supported Zirconocene Catalysts

Mingkwan Wannaborworn; Thanai Sriphaisal; Piyasan Praserthdam; Bunjerd Jongsomjit

doi:10.4186/ej.2015.19.5.55

Ethylene/1-Hexene Copolymerization over Different Phases Titania-Supported Zirconocene Catalysts

Authors

Mingkwan Wannaborworn Chulalongkorn University
Thanai Sriphaisal Chulalongkorn University
Piyasan Praserthdam Chulalongkorn University
Bunjerd Jongsomjit Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2015.19.5.55

Keywords:

Metallocene, copolymerization, titania, heterogeneous catalys

Abstract

Ethylene/1-hexene copolymerization was performed over titania-supported zirconocene/dMMAO catalysts. Effects of titania having different phases on the catalytic activity and polymer properties were investigated. It was found that anatase titania exhibited the highest catalytic activity, and afforded copolymer with high 1-hexene incorporation among other titanias. According to TGA result, the stronger interaction between dMMAO and titania for anatase phase led to the highest catalytic activity, because the stronger interaction between cocatalyst and support would prevent the leaching of cocatalyst. Additionally, based on EDX mapping, a good dispersion of dMMAO over support surface is another reason for an increase in the catalytic activity. SEM analysis indicated that no significant change in polymer morphology was found for all supported catalysts. The incorporation of 1-hexene determined by 13C NMR suggested that titania which possessed high amount of [Al]dMMAO over support surface showed high ability to incorporate 1-hexene. The random copolymers were produced in all systems.

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Author Biographies

Mingkwan Wannaborworn
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Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Thanai Sriphaisal
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Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Piyasan Praserthdam
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Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Bunjerd Jongsomjit
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Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

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Published In

Vol 19 No 5, Oct 31, 2015

How to Cite

[1]

M. Wannaborworn, T. Sriphaisal, P. Praserthdam, and B. Jongsomjit, “Ethylene/1-Hexene Copolymerization over Different Phases Titania-Supported Zirconocene Catalysts”, Eng. J., vol. 19, no. 5, pp. 55-67, Oct. 2015.

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