Ethylene–norbornene copolymerization by rare-earth metal complexes and by carbon nanotube-supported metallocene catalysis (Articolo in rivista)

Type
Label
  • Ethylene–norbornene copolymerization by rare-earth metal complexes and by carbon nanotube-supported metallocene catalysis (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/masy.200751416 (literal)
Alternative label
  • I. Tritto, L. Boggioni, A. Ravasio, C. Zampa, J. Hitzbleck, J. Okuda, S. Bredeau, P. Dubois (2007)
    Ethylene–norbornene copolymerization by rare-earth metal complexes and by carbon nanotube-supported metallocene catalysis
    in Macromolecular symposia
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • I. Tritto, L. Boggioni, A. Ravasio, C. Zampa, J. Hitzbleck, J. Okuda, S. Bredeau, P. Dubois (literal)
Pagina inizio
  • 114 (literal)
Pagina fine
  • 121 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://onlinelibrary.wiley.com/doi/10.1002/masy.200751416/abstract (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 260 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • I. Tritto, L. Boggioni, A. Ravasio, C. Zampa,Istituto per lo Studio delle Macromolecole (ISMAC) – CNR, Via Bassini 15, 20133 Milano J. Hitzbleck, J. Okuda, Institute of Inorganic Chemistry, RWTH Aachen University - Landoltweg 1 - D-52074 Aachen (Germany) S. Bredeau, P. Dubois, Services des Materiaux Polymeres et composites, Università de Mons-Hainaut, Place du Parc 20, Mons (Belgium (literal)
Titolo
  • Ethylene–norbornene copolymerization by rare-earth metal complexes and by carbon nanotube-supported metallocene catalysis (literal)
Abstract
  • E-N copolymerization with a number of half-sandwich rare-earth metal compounds [M(eta 5-C(5)Me(4)SiMe(2)R)(eta 1-CH(2)SiMe(3))(2)(L)] (M = Sc, Y, Lu) has been achieved. Mainly atactic alternating E-N copolymers are obtained with all catalytic systems. Interestingly, copolymers arising from [Sc(eta 5-C(5)Me(4)SiMe(2)C(6)F(5))(eta(1)-CH(2)SiMe(3))(2)(THF)]/[/ [Ph(3)C][B(C(6)F(5))(4)] possess narrower molar mass distributions than those from [SC(eta(5)-C(5)Me(4)SiMe(3))(eta(1)-CH(2)SiMe(3))(2)(THF)]/[Ph(3)C][B(C(6)F(5))(4)]. In addition, homogeneous surface coating of multi-walled carbon nanotubes is accomplished for the first time by in situ E-N copolymerization as catalyzed by rac-Et(Ind)(2)ZrCl(2)/MMAO-3A anchored onto the carbon nanotube surface. The copolymerization reaction allows for the destructuration of the native nanotube bundles. The relative quantity of E-N copolymer can be tuned up as well as the norbornene content in the formed copolymers and accordingly their glass transition temperature. By melt blending with an ethylene-vinyl-co-acetate copolymer (27 wt.-% vinyl acetate comonomer) matrix, high performance polyolefinic nanocomposites are obtained. (literal)
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