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Polymethylaluminoxane organic frameworks (sMAOF) – highly active supports for slurry phase ethylene polymerisation

DOI: 10.1039/D1CY00767J DOI Help

Authors: Alexander F. R. Kilpatrick (University of Oxford) , Harry S. Geddes (University of Oxford) , Zoe R. Turner (University of Oxford) , Jean-Charles Buffet (University of Oxford) , Andrew L. Goodwin (University of Oxford) , Dermot O'Hare (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Catalysis Science & Technology , VOL 15

State: Published (Approved)
Published: July 2021
Diamond Proposal Number(s): 16072 , 19128

Open Access Open Access

Abstract: A series of modified solid polymethylaluminoxane (sMAO) catalyst supports have been developed for slurry phase ethylene polymerisation, using aryl di-ol modifier groups. Characterisation using ICP-MS analysis, X-ray total scattering, SEM–EDX, diffuse FT-IR and solid state NMR spectroscopy shows that the organic linker groups are uniformly distributed in a proposed organic framework stucture we call a “sMAOF”. When used as a support for rac-ethylene{bis(1-indenyl)} zirconium dichloride, (EBI)ZrCl2, these linker modified sMAOF materials provide a 40% enhancement in polymerisation activity with respect to unmodified sMAO: activities of 163 × 103 and 116 × 103 kgPE molZr−1 h−1 at 80 °C for (EBI)ZrCl2 supported on sMAOF(1,4-HO(C6F4)OH) and sMAO, respectively. The observed activity increase is correlated with the higher BET surface area and increased porosity in the linker modified sMAOF activating support.

Subject Areas: Chemistry, Materials

Instruments: I15-1-X-ray Pair Distribution Function (XPDF)

Discipline Tags:

Physical Chemistry Catalysis Chemistry Material Sciences Metal-Organic Frameworks Metallurgy Organometallic Chemistry

Technical Tags:

Scattering Total Scattering