Polyethylene formation on a planar surface science model of a chromium oxide polymerization catalyst

P.C. Thuene; J. Loos; P.J. Lemstra; J.W. Niemantsverdriet

doi:10.1006/jcat.1999.2448

Polyethylene formation on a planar surface science model of a chromium oxide polymerization catalyst

P.C. Thuene
, J. Loos
, P.J. Lemstra
, J.W. Niemantsverdriet

Research output: Contribution to journal › Article › Academic › peer-review

44 Citations (Scopus)

Abstract

A planar CrOx/SiO2/Si(100) model for the Phillips ethylene polymerization catalyst has been prepared by spin-coat impregnation from an aqueous solution of CrO3. In order to test the model catalyst with its extremely low chromium content, a special reactor was designed with a CrOx/Al2O3filter to effectively remove impurities. The model catalyst polymerizes ethylene in the gas phase at 160°C with a constant activity and forms a 350-nm-thick layer of polyethylene in 1 h. Atomic force microscopy reveals the expected spherulite morphology of the polyethylene films in different stages of development. The work opens attractive opportunities for future studies of nascent morphology of catalytically formed polymers.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Catalysis
Volume	183
Issue number	1
DOIs	https://doi.org/10.1006/jcat.1999.2448
Publication status	Published - 1999

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10.1006/jcat.1999.2448

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abstract = "A planar CrOx/SiO2/Si(100) model for the Phillips ethylene polymerization catalyst has been prepared by spin-coat impregnation from an aqueous solution of CrO3. In order to test the model catalyst with its extremely low chromium content, a special reactor was designed with a CrOx/Al2O3filter to effectively remove impurities. The model catalyst polymerizes ethylene in the gas phase at 160°C with a constant activity and forms a 350-nm-thick layer of polyethylene in 1 h. Atomic force microscopy reveals the expected spherulite morphology of the polyethylene films in different stages of development. The work opens attractive opportunities for future studies of nascent morphology of catalytically formed polymers.",

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AU - Loos, J.

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AU - Niemantsverdriet, J.W.

PY - 1999

Y1 - 1999

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AB - A planar CrOx/SiO2/Si(100) model for the Phillips ethylene polymerization catalyst has been prepared by spin-coat impregnation from an aqueous solution of CrO3. In order to test the model catalyst with its extremely low chromium content, a special reactor was designed with a CrOx/Al2O3filter to effectively remove impurities. The model catalyst polymerizes ethylene in the gas phase at 160°C with a constant activity and forms a 350-nm-thick layer of polyethylene in 1 h. Atomic force microscopy reveals the expected spherulite morphology of the polyethylene films in different stages of development. The work opens attractive opportunities for future studies of nascent morphology of catalytically formed polymers.

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Polyethylene formation on a planar surface science model of a chromium oxide polymerization catalyst

Abstract

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