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Issue 11, 2019
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Group 4 permethylindenyl complexes for slurry-phase polymerisation of ethylene

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Abstract

A series of ten well-defined group 4 ansa-bridged permethylindenyl complexes have been prepared, fully characterised and supported on inorganic solid supports. These catalysts were investigated in the slurry-phase polymerisation of ethylene. A range of inorganic solid supports have been utilised; solid polymethylaluminoxane (sMAO), MAO modified layered double hydroxide (LDHMAO) and MAO modified silica (SSMAO). The sMAO supported catalytic systems exhibit some of the highest slurry-phase polymerisation activities reported in literature with activities reaching 9509 kgPE molM−1 h−1 bar−1 for Me2SB(CpMe,I*)ZrMe2 at 80 °C after 5 minutes of polymerisation; 34% more active than an industrial standard under similar conditions. These systems produce polyethylenes with low molecular weights, Mw, reaching as low as 46 kg mol−1 for E-Me2SB(CpnBu,I*)ZrCl2 at 90 °C after 30 minutes of polymerisation with a uniform, mono-disperse “popcorn” morphology. The sMAO supported systems show much higher catalytic activities and much more industrially desirable polyethylene morphology than the same complexes supported on LDHMAO and SSMAO.

Graphical abstract: Group 4 permethylindenyl complexes for slurry-phase polymerisation of ethylene

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Publication details

The article was received on 19 Dec 2018, accepted on 21 Jan 2019 and first published on 21 Jan 2019


Article type: Paper
DOI: 10.1039/C8PY01796D
Citation: Polym. Chem., 2019,10, 1386-1398

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    Group 4 permethylindenyl complexes for slurry-phase polymerisation of ethylene

    J. V. Lamb, J. Buffet, Z. R. Turner and D. O'Hare, Polym. Chem., 2019, 10, 1386
    DOI: 10.1039/C8PY01796D

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