Cristin-resultat-ID: 1558771
Sist endret: 1. november 2018, 17:03
NVI-rapporteringsår: 2018
Resultat
Vitenskapelig artikkel
2018

Silica-Grafted Neodymium Catalysts for the Production of Ultra-High Molecular Weight 1,4-cis-Polyisoprene

Bidragsytere:
  • Erwan Le Roux
  • Yucang Liang og
  • Reiner Anwander

Tidsskrift

ChemCatChem
ISSN 1867-3880
e-ISSN 1867-3899
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2018
Volum: 10
Hefte: 8
Sider: 1905 - 1911

Importkilder

Scopus-ID: 2-s2.0-85042209730

Klassifisering

Vitenskapsdisipliner

Uorganisk kjemi

Emneord

Katalyse

Beskrivelse Beskrivelse

Tittel

Silica-Grafted Neodymium Catalysts for the Production of Ultra-High Molecular Weight 1,4-cis-Polyisoprene

Sammendrag

Supported neodymium-based Ziegler-type catalysts are obtained by grafting homoleptic methylaluminate Nd(AlMe4)3 onto high-surface silicas including periodic mesoporous silica MCM-41, SBA-15, and KIT-6. Low [Et2AlCl]-cocatalyst contents allow for the fabrication of polyisoprenes with ultra-high molecular weight (UHMWPI). The synthetic rubbers display molecular weights as high as 3×106 g mol–1, polydispersity indices (PDIs) as low as 1.2, and microstructures with 99% cis-stereospecificity. Combined analysis of the organolanthanide/silica hybrid materials by nitrogen physisorption, FTIR and MAS-NMR spectroscopy, as well as elemental(metal) analysis, assist in elucidating the intra-pore surface organometallic chemistry, and suggest the formation of unprecedented organolanthanide species.

Bidragsytere

Erwan Le Roux

  • Tilknyttet:
    Forfatter
    ved Kjemisk institutt ved Universitetet i Bergen

Yucang Liang

  • Tilknyttet:
    Forfatter
    ved Eberhard-Karls-Universität Tübingen

Reiner Anwander

  • Tilknyttet:
    Forfatter
    ved Eberhard-Karls-Universität Tübingen
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