Relaxation dynamics in tert-butylpyridine/tristyrene mixture investigated by broadband dielectric spectroscopy (Articolo in rivista)

Type

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

Label

• Relaxation dynamics in tert-butylpyridine/tristyrene mixture investigated by broadband dielectric spectroscopy (Articolo in rivista) (literal)

Anno

• 2007-01-01T00:00:00+01:00 (literal)

Alternative label

• Kessairi, K; Capaccioli, S; Prevosto, D; Lucchesi, M; Rolla, P (2007)
  Relaxation dynamics in tert-butylpyridine/tristyrene mixture investigated by broadband dielectric spectroscopy
  
  (literal)

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

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

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

• 127 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• Univ Pisa, INFM, CNR, PolyLab, I-56127 Pisa, Italy; Univ Pisa, Dipartmento Fis, I-56127 Pisa, Italy; Univ Pisa, INFM, CNR, CRS SOFT Roma, I-56127 Pisa, Italy (literal)

Titolo

• Relaxation dynamics in tert-butylpyridine/tristyrene mixture investigated by broadband dielectric spectroscopy (literal)

Abstract

• We investigated, by means of dielectric spectroscopy, the relaxation dynamics of glass forming binary mixtures composed by the quite rigid polar molecules tert-butylpyridine dissolved in the apolar solvent tristyrene. By changing the relative concentration of the components we observed a transition from a relaxation scenario with a structural process and an excess wing to that with a structural process and a well resolved secondary process. Another relaxation process, slower than the latter, was observed, well below T-g. Our detailed analysis evidenced that the secondary relaxation with shorter relaxation time can be identified as the Johari-Goldstein relaxation for all the mixtures, whereas the new relaxation process was attributed to a different type of motion of tert-butylpyridine needing a larger amount of free volume for the molecular rotation. (c) 2007 American Institute of Physics. (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

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

Insieme di parole chiave

• Keywords of "Relaxation dynamics in tert-butylpyridine/tristyrene mixture investigated by broadband dielectric spectroscopy" (Insieme di parole chiave)

Incoming links:

Autore CNR di

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

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)

Insieme di parole chiave di

• Keywords of "Relaxation dynamics in tert-butylpyridine/tristyrene mixture investigated by broadband dielectric spectroscopy" (Insieme di parole chiave)