New stereoregularity in the stereospecific polymerization of Bulky strained olefins: crystalline diheterotactic polynorbornene (Articolo in rivista)

Type
Label
  • New stereoregularity in the stereospecific polymerization of Bulky strained olefins: crystalline diheterotactic polynorbornene (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/ma702769x (literal)
Alternative label
  • Ricci G.; Boglia A.; Boccia A. C.; Zetta L.; Famulari A.; Meille S.V. (2008)
    New stereoregularity in the stereospecific polymerization of Bulky strained olefins: crystalline diheterotactic polynorbornene
    in Macromolecules (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ricci G.; Boglia A.; Boccia A. C.; Zetta L.; Famulari A.; Meille S.V. (literal)
Pagina inizio
  • 3109 (literal)
Pagina fine
  • 3113 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.acs.org/doi/pdf/10.1021/ma702769x (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 41 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • G. Ricci - Ismac-Milano, A. Boglia - Ismac-Milano, A. C Boccia - Ismac-Milano, L. Zetta - Ismac-Milano, A. Famulari - Politecnico di Milano, S.V. Meille - Politecnico di Milano. (literal)
Titolo
  • New stereoregularity in the stereospecific polymerization of Bulky strained olefins: crystalline diheterotactic polynorbornene (literal)
Abstract
  • A new semicrystalline polynorbornene was obtained by stereospecific polymerization with CrCl2(dppa)-MAO catalyst (dppa ) bis(diphenylphosphino)amine). NMR, X-ray diffraction, and modeling techniques were used, concentrating on the soluble lower molecular weight fractions, to characterize the polymer structure. The polymer presents a 2,3-exo-diheterotactic stereochemistry never observed before in the polymerization of alkenes. High symmetry, low energy chain conformations accounting for 13C NMR data are devised. Efficient crystalline packing models consistent with powder X-ray diffraction patterns and density requirements are proposed. (literal)
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