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Issue 13, 2015
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Ethylene polymerisation using solid catalysts based on layered double hydroxides

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Abstract

We report here the use of methylaluminoxane (MAO) modified aqueous miscible organic solvent treated (AMOST) layered double hydroxide, Mg6Al2(OH)16CO3·4H2O (AMO-Mg3Al-CO3) as a catalyst support system for the slurry phase polymerisation of ethylene using immobilised metallocene and non-metallocene metal complexes. The polymerisation data demonstrates that the catalyst productivity is dependent on the thermal treatment of the LDH and the temperature, pressure and time of the polymerisation. The solid catalyst system, AMO-Mg3Al-CO3/MAO/(MesPDI)FeCl2 has been shown to have the highest overall activity for a non-metallocene system (14166 kgPE mol−1complex h−1 bar−1), and AMO-Mg3Al-CO3/MAO/(2-Me,4-PhSBI)ZrCl2 was the most productive for a metallocene-based system (∼3300 kgPE mol−1complex h−1 bar−1). The molecular weights and polydispersities vary with the complex on the AMO-LDH surface. Scanning electron microscopy images show that the morphology of the as produced polyethylene mimics that of the LDH support.

Graphical abstract: Ethylene polymerisation using solid catalysts based on layered double hydroxides

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Supplementary files

Article information


Submitted
16 Dec 2014
Accepted
29 Jan 2015
First published
12 Feb 2015

Polym. Chem., 2015,6, 2493-2503
Article type
Paper
Author version available

Ethylene polymerisation using solid catalysts based on layered double hydroxides

J. Buffet, Z. R. Turner, R. T. Cooper and D. O'Hare, Polym. Chem., 2015, 6, 2493
DOI: 10.1039/C4PY01742K

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