Relation Between Configurational Entropy and Relaxation Dynamics of Glass-Forming Systems under Volume and Temperature Reduction (Articolo in rivista)

Type

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

Label

• Relation Between Configurational Entropy and Relaxation Dynamics of Glass-Forming Systems under Volume and Temperature Reduction (Articolo in rivista) (literal)

Anno

• 2009-01-01T00:00:00+01:00 (literal)

Alternative label

• Capaccioli, S.; Prevosto, D.; Lucchesi, M.; Amirkhani, M.; Rolla, P.A. (2009)
  Relation Between Configurational Entropy and Relaxation Dynamics of Glass-Forming Systems under Volume and Temperature Reduction
  in Journal of non-crystalline solids
  (literal)

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

• Capaccioli, S.; Prevosto, D.; Lucchesi, M.; Amirkhani, M.; Rolla, P.A. (literal)

Pagina inizio

• 753 (literal)

Pagina fine

• 758 (literal)

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

• 355 (literal)

Rivista

• Journal of non-crystalline solids (Rivista)

Note

• ISI Web of Science (WOS) (literal)

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

• Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy INFM-CNR, PolyLab, Largo B. Pontecorvo 3, I-56127 Pisa, Italy (literal)

Titolo

• Relation Between Configurational Entropy and Relaxation Dynamics of Glass-Forming Systems under Volume and Temperature Reduction (literal)

Abstract

• The structural relaxation dynamics of two molecular glass-forming systems have been analyzed by means of dielectric spectroscopy, under cooling and compression conditions. The relation of the dynamic slowing down with the reduction of the configurational entropy, SC, as predicted by Adam and Gibbs (AG), was also investigated. As SC is not directly accessible by experiments, it was estimated, following a common procedure in literature, from the excess entropy Sexc of the supercooled liquid with respect to the crystal, determined from calorimetric and expansivity measurements over the same T–P range of dynamics investigation. The AG relation, predicting linear dependence between the logarithmic of structural relaxation time and the reciprocal of the product of temperature with configurational entropy, was successfully tested. Actually, a bilinear relation between Sexc and SC was found, with different proportionality factors in isothermal and isobaric conditions. Using such results, we derived an equation for predicting the pressure dependence of the glass transition temperature, in good accordance with the experimental values in literature. (literal)

Prodotto di

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• MD.P01.017.001 Film di materiali polimerici: effett di confinamento superficiale ed applicazioni (MD.P01.017.002) (Modulo)

Autore CNR

• DANIELE PREVOSTO (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Relation Between Configurational Entropy and Relaxation Dynamics of Glass-Forming Systems under Volume and Temperature Reduction" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• MD.P01.017.001 Film di materiali polimerici: effett di confinamento superficiale ed applicazioni (MD.P01.017.002) (Modulo)

Autore CNR di

• DANIELE PREVOSTO (Unità di personale interno)

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

• Journal of non-crystalline solids (Rivista)

Insieme di parole chiave di

• Parole chiave di "Relation Between Configurational Entropy and Relaxation Dynamics of Glass-Forming Systems under Volume and Temperature Reduction" (Insieme di parole chiave)