Studies of network organization and dynamics of e-beam crosslinked PVPs: From macro to nano (Articolo in rivista)

Type
Label
  • Studies of network organization and dynamics of e-beam crosslinked PVPs: From macro to nano (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.radphyschem.2011.11.057 (literal)
Alternative label
  • Dispenza C; Grimaldi N; Sabatino MA; Todaro S; Bulone D; Giacomazza D; Przybytniak G; Alessi A; Spadaro G (2012)
    Studies of network organization and dynamics of e-beam crosslinked PVPs: From macro to nano
    in Radiation physics and chemistry (1993); Pergamon-Elsevier Press Science LDT, Oxford (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Dispenza C; Grimaldi N; Sabatino MA; Todaro S; Bulone D; Giacomazza D; Przybytniak G; Alessi A; Spadaro G (literal)
Pagina inizio
  • 1349 (literal)
Pagina fine
  • 1353 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0969806X11004555 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 81 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica, Università degli Studi di Palermo, Viale delle Scienze Ed. 6, 90128 Palermo, Italy; CNR - Istituto di Biofisica (Palermo unit), Via U. La Malfa 153, 90146 Palermo, Italy; Centre for Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland (literal)
Titolo
  • Studies of network organization and dynamics of e-beam crosslinked PVPs: From macro to nano (literal)
Abstract
  • In this work the influence of poly(N-vinyl pyrrolidone) (PVP) concentration in water on the organization and dynamics of the corresponding macro-/nanogel networks has been systematically investigated. Irradiation has been performed at the same irradiation dose (within the sterilization dose range) and dose rate. In the selected irradiation conditions, the transition between macroscopic gelation and micro-/nanogels formation is observed just below the critical overlap concentration (~1 wt%), whereas the net prevalence of intra-molecular over inter-molecular crosslinking occurs at a lower polymer concentration (below 0.25 wt%). Dynamic-mechanical spectroscopy has been applied as a classical methodology to estimate the network mesh size for macrogels in their swollen state, while 13C NMR spin-lattice relaxation spectroscopy has been applied on both the macrogel and nanogel freeze dried residues to withdraw interesting information of the network spatial organization in the passage of scale from macro to nano. (literal)
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