Secondary dynamics in glass formers: Relation with the structural dynamics and the glass transition (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Secondary dynamics in glass formers: Relation with the structural dynamics and the glass transition (Articolo in rivista) (literal)

Anno

• 2007-01-01T00:00:00+01:00 (literal)

Alternative label

• Prevosto, D; Capaccioli, S; Sharifi, S; Kessairi, K; Lucchesi, M; Rolla, PA (2007)
  Secondary dynamics in glass formers: Relation with the structural dynamics and the glass transition
  in Journal of non-crystalline solids
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Prevosto, D; Capaccioli, S; Sharifi, S; Kessairi, K; Lucchesi, M; Rolla, PA (literal)

Pagina inizio

• 4278 (literal)

Pagina fine

• 4282 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 353 (literal)

Rivista

• Journal of non-crystalline solids (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Univ Pisa, Dept Phys, I-56127 Pisa, Italy; CNR, PolyLab, I-56127 Pisa, Italy; CNR, INFM, CRS SOFT, I-00185 Rome, Italy (literal)

Titolo

• Secondary dynamics in glass formers: Relation with the structural dynamics and the glass transition (literal)

Abstract

• In this paper, we study secondary relaxations in a neat glass former close and below the glass transition. The pressure and temperature dependences of the characteristic relaxation frequencies were investigated to find a connection between structural and secondary relaxations and the microscopic mechanism at the basis of the latter. We found that the ratio between the relaxation time of the structural and secondary processes is almost constant when considered at different values of temperature and pressure corresponding to the glass transition (same value of structural relaxation time). This result is also related to the finding of a constant broadness of the structural peak. We propose to use such dynamic relation between the two processes to distinguish between intramolecular secondary relaxation, reflecting the local motion of molecular subgroups, and intermolecular secondary relaxation, called also Johari-Goldstein process, originating by a local motion of the whole molecule. (c) 2007 Elsevier B.V. All rights reserved. (literal)

Prodotto di

• Materia soffice: Dinamica di non-equilibrio e complessita (MD.P02.014.001) (Modulo)
• Film di materiali polimerici: effett di confinamento superficiale ed applicazioni (MD.P01.017.001) (Modulo)

Autore CNR

• SIMONE CAPACCIOLI (Unità di personale interno)
• PIERANGELO ROLLA (Unità di personale esterno)
• MAURO LUCCHESI (Persona)
• SOHEIL SHARIFI (Unità di personale esterno)

Insieme di parole chiave

• Parole chiave di "Secondary dynamics in glass formers: Relation with the structural dynamics and the glass transition" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• PIERANGELO ROLLA (Unità di personale esterno)
• SIMONE CAPACCIOLI (Unità di personale interno)
• MAURO LUCCHESI (Persona)
• SOHEIL SHARIFI (Unità di personale esterno)

Prodotto

• Film di materiali polimerici: effett di confinamento superficiale ed applicazioni (MD.P01.017.001) (Modulo)
• Materia soffice: Dinamica di non-equilibrio e complessita (MD.P02.014.001) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Journal of non-crystalline solids (Rivista)

Insieme di parole chiave di

• Parole chiave di "Secondary dynamics in glass formers: Relation with the structural dynamics and the glass transition" (Insieme di parole chiave)