de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Ethene/norbornene copolymerization using the catalyst system Pri[(3-Pri-Cp)Flu]ZrCl2: Determination of the copolymerization parameters and mechanistic considerations

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons59106

Wendt,  R. A.
Research Department Fink, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons58838

Mynott,  R.
Service Department Mynott (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;
Service Department Mynott (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;
Service Department Mynott (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons58549

Fink,  G.
Research Department Fink, Max-Planck-Institut für Kohlenforschung, Max Planck Society;
Research Department Fink, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Wendt, R. A., Mynott, R., & Fink, G. (2002). Ethene/norbornene copolymerization using the catalyst system Pri[(3-Pri-Cp)Flu]ZrCl2: Determination of the copolymerization parameters and mechanistic considerations. Macromolecular Chemistry and Physics, 203(18), 2531-2539. doi:10.1002/macp.200290048.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-995F-7
Zusammenfassung
The (13) NMR spectra of ethane/norbornene copolymers in which there are no norbornene microblocks are much simpler than those of copolymers in which norbornene microblocks are present, making it possible to completely assign all the C-13 resonances to the corresponding pentads in the copolymer chain. However, there is disagreement in the literature over several assignments of the ethane C-13 NMR signals. In this paper these discrepencies are summarized and discussed. This contribution also reports ethane/norbornene copolymerizations carried out at various temperatures using the homogeneous catalyst system Pr[(3-Pr-Cp)Flu]ZrCl2. The C-13 NMR spectra of the copolymers were analyzed in the light of the discussion above and the triad discussions were used to determine the copolmerization parameters by Markov first- and second-order statistical models. On the basis of these results, the mechanism generating such an alternating microstructure in these copolymers is discussed and compared with the mechanism previously proposed in the literature. The C-13 NMR spectrum with signal assignments of an ethane/norbornene copolymer without norbornene microblocks.