Catalytic Polymerization in Dense CO2 to Controlled Microstructure Polyethylenes

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Macromolecules. 2009, 42(21), pp. 8157-8164. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma901397q
Zusammenfassung

A series of partially novel, (κ2-N,O) Ni(II) methyl complexes coordinated by pyridine or N,N,N′,N′-tetramethylethylenediamine (tmeda), based on different κ2-N,O-chelating salicylaldimines, 2,6-diisopropylanilinotropone, and a ketoenamine, were studied as precatalysts for olefin polymerization in dense carbon dioxide. Bis(trifluoromethyl)phenyl substituents promote solubility in the CO2 reaction medium, as quantified by solubility studies of the free N,OH ligands over a range of CO2 densities (ρ = 0.2−0.9 g mL−1) at 25 and 50 °C and thus enhance catalyst activities. By appropriate choice of the catalyst precursor and polymerization reaction conditions (CO2 density, ethylene concentration, and temperature), strictly linear polyethylene with high molecular weight is obtained (

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ISO 690GUIRONNET, Damien, Inigo GÖTTKER-SCHNETMANN, Stefan MECKING, 2009. Catalytic Polymerization in Dense CO2 to Controlled Microstructure Polyethylenes. In: Macromolecules. 2009, 42(21), pp. 8157-8164. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma901397q
BibTex
@article{Guironnet2009Catal-9947,
  year={2009},
  doi={10.1021/ma901397q},
  title={Catalytic Polymerization in Dense CO2 to Controlled Microstructure Polyethylenes},
  number={21},
  volume={42},
  issn={0024-9297},
  journal={Macromolecules},
  pages={8157--8164},
  author={Guironnet, Damien and Göttker-Schnetmann, Inigo and Mecking, Stefan}
}
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