Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 106, 2015
Previous Article Next Article

Synthesis and characterisation of permethylindenyl zirconium complexes and their use in ethylene polymerisation

Author affiliations

Abstract

We report the synthesis of two zirconocenes, dimethylsilylbis(hexamethylindenyl) zirconium dichloride, rac-(SBI*)ZrCl2, and nbutyldimethylsilyl(hexamethylindenyl) zirconium trichloride, [(Ind*SiMe2nBu)Zr(μ-Cl)Cl2]2. The complexes were characterised by NMR spectroscopy and X-ray crystallography, and the bonding was evaluated using density functional theory. rac-(SBI*)ZrCl2 demonstrated a very high activity for solution phase polymerisation of ethylene (ca. 22 500 kgPE−1 molZr−1 h−1 bar−1). Both rac-(SBI*)ZrCl2 and rac-(EBI*)ZrCl2 (EBI* = ethylenebis(hexamethylindenyl)) have been supported on MAO modified silica and AMOST layered double hydroxides (AMO-LDHs), and evaluated as catalysts in the slurry-phase polymerisation of ethylene. The highest catalytic polymerisation activities for rac-(SBI*)ZrCl2 and rac-(EBI*)ZrCl2 on the layered double hydroxides were 9657 and 4325 kgPE−1 molZr−1 h−1 bar−1 respectively, for MAO modified Mg2Al–SO4 LDH. However, rac-(EBI*)ZrCl2 was a three times more active catalyst than rac-(SBI*)ZrCl2 when supported on silica.

Graphical abstract: Synthesis and characterisation of permethylindenyl zirconium complexes and their use in ethylene polymerisation

Back to tab navigation

Supplementary files

Article information


Submitted
03 Oct 2015
Accepted
07 Oct 2015
First published
08 Oct 2015

RSC Adv., 2015,5, 87456-87464
Article type
Paper
Author version available

Synthesis and characterisation of permethylindenyl zirconium complexes and their use in ethylene polymerisation

J. Buffet, T. A. Q. Arnold, Z. R. Turner, P. Angpanitcharoen and D. O'Hare, RSC Adv., 2015, 5, 87456
DOI: 10.1039/C5RA20465H

Social activity

Search articles by author

Spotlight

Advertisements