Improved single-site chromium catalysts with electron rich indenyl ligands for the formation of ultrahigh molecular weight polyethylene

• Verfasst von: Hansen, Helge-Boj [VerfasserIn]
• Verfasst von: Wadepohl, Hubert [VerfasserIn]
• Verfasst von: Enders, Markus [VerfasserIn]
• Titel: Improved single-site chromium catalysts with electron rich indenyl ligands for the formation of ultrahigh molecular weight polyethylene
• Verf.angabe: Helge-Boj Hansen, Hubert Wadepohl, and Markus Enders
• Jahr: 2021
• Umfang: 9 S.
• Fussnoten: First published: 10 February 2021 ; Gesehen am 24.11.2022
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2021
• Band/Heft Quelle: (2021), 13, Seite 1278-1286
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.202001157
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1823558577
• K10plus-PPN:
  Universitätsbibliothek
• Lokale URL UB: Zum Volltext

Abstract

Quinolyl functionalized indenyl chromium complexes with different substitution patterns were synthesized and evaluated as single site catalysts in ethylene polymerization. Adding substituents like a fused cyclohexyl ring or a Si(CH3)3 group to the indenyl moiety improve complex stability, solubility and catalytic activity compared to the unsubstituted analogues. Furthermore, the ability to incorporate 1-hexene into the polymer chain increased. Ultrahigh molecular weight polyethylene (UHMW-PE) or linear low density polyethylene (LLD-PE) with very high molecular weight was obtained. Although other catalysts are able to incorporate more 1-hexene only a few systems are known, that combine substantial 1-hexene incorporation with very high activity and such high molecular weights. Consequently, these catalytic systems are attractive candidates in industrial processes for the production of improved polyethylene materials.