Excess wing and Johari-Goldstein relaxation in binary mixtures of glass formers (Articolo in rivista)

Type
Label
  • Excess wing and Johari-Goldstein relaxation in binary mixtures of glass formers (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Prevosto, D; Kessairi, K; Capaccioli, S; Lucchesi, M; Rolla, PA (2007)
    Excess wing and Johari-Goldstein relaxation in binary mixtures of glass formers
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Prevosto, D; Kessairi, K; Capaccioli, S; Lucchesi, M; Rolla, PA (literal)
Pagina inizio
  • 643 (literal)
Pagina fine
  • 650 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 87 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR, PolyLab, I-56127 Pisa, Italy; Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy; CNR, INFM Soft, I-00185 Rome, Italy (literal)
Titolo
  • Excess wing and Johari-Goldstein relaxation in binary mixtures of glass formers (literal)
Abstract
  • Dielectric loss Spectra Of pure quinaldine and tert-butylpyridine and their mixtures With tristyrene are presented. The pure systems present lit excess wing and no secondary peaks in the temperature interval from above to well below the glass transition. However, when mixed in low concentration with tristyrene the excess wing is replaced by a distinct secondary peak. This distinct process can be identified as a Johari-Goldstein relaxation within the Coupling mode interpretation. lit the frame Of the Coupling Model the transition from the relaxation scenario with the excess wing to that with a distinct secondary peak is related to the increase of intermolecular constraints. In our case this increase of constraints is due to the low mobility component of the mixture (tristyrene). (literal)
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