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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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Publication details

The article was received on 16 des. 2014, accepted on 29 jan. 2015 and first published on 12 feb. 2015


Article type: Paper
DOI: 10.1039/C4PY01742K
Author version available: Download Author version (PDF)
Citation: Polym. Chem., 2015,6, 2493-2503
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    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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