A non-PFT (polymerization filling technique) approach to poly(ethylene-co-norbornene)/MWNTs nanocomposites by in situcopolymerization with scandium half-sandwich catalyst. (Articolo in rivista)

Type
Label
  • A non-PFT (polymerization filling technique) approach to poly(ethylene-co-norbornene)/MWNTs nanocomposites by in situcopolymerization with scandium half-sandwich catalyst. (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/pola.23614 (literal)
Alternative label
  • Ravasio A.; Boggioni L.; Tritto I.; D'Arrigo C.; Perico A.; Hitzbleck J.; Okuda J. (2009)
    A non-PFT (polymerization filling technique) approach to poly(ethylene-co-norbornene)/MWNTs nanocomposites by in situcopolymerization with scandium half-sandwich catalyst.
    in Journal of polymer science. Part A, Polymer chemistry (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ravasio A.; Boggioni L.; Tritto I.; D'Arrigo C.; Perico A.; Hitzbleck J.; Okuda J. (literal)
Pagina inizio
  • 5709 (literal)
Pagina fine
  • 5710 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://onlinelibrary.wiley.com/doi/10.1002/pola.23614/pdf (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 47 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 21 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Ravasio A., Boggioni L., Tritto I.-CNR, ISMAC, Milano, D'Arrigo C., Perico A.- CNR, ISMAC, Sezione di Genova, Hitzbleck J., Okuda J.- Rhein Westfal TH Aachen, Inst Anorgan Chem (literal)
Titolo
  • A non-PFT (polymerization filling technique) approach to poly(ethylene-co-norbornene)/MWNTs nanocomposites by in situcopolymerization with scandium half-sandwich catalyst. (literal)
Abstract
  • The in situ synthesis of ethylene-co-norbornene copolymers/multi-walled carbon nanotubes (MWNTs) nanocomposites was achieved by rare-earth half-sandwich scandium precursor [Sc(?6-C5Me4SiMe 3)(?1-CH2SiMe3)2(THF)] (1) activated by [Ph3C][B(C6Fg)4], through a non-PFT (Polymerization Filling Technique) approach. MWNTs nanocomposites with low aluminum residue were obtained with excellent yields even though small amounts of triisobutylaluminium were needed as scavenger to prevent catalyst poisoning by MWNT impurities. MWNT bundles were disaggregated and highly coated with Poly(ethylene-co-norbornene) [P(E-co-N)] as revealed by transmission electron microscopy. Interestingly, P(E-co-N) copolymers showed Ts over 130 °C as well as norbornene content over 50 mol %; both values were higher than those obtained by the cationic active species in 1/[Ph3C][B(C 6Fg)4]. A series of copolymerization reactions by 1/[Ph3C][B(CeFs)4]ZAFBu3 without MWNTs produced copolymers with the same unexpected features. The NMR analysis revealed the presence of roc-ENNE and rac-ENNNE sequences. Thus, AliBu3 changed the stereoirregular alternating copolymer microstructure produced by 1/[Ph3C][B(C6F5)4]. We conclude that AliBu3 is not only a scavenger for CNT impurities, but it reacts with the THF ligand to give coordinatively unsaturated active species. Finally, P(E-co-N)/MWNT masterbatches were mixed with commercial TOPAS to produce cyclic olefin copolymer nanocomposites with excellent dispersion of filler. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it