Relaxation dynamics and evidence of scaling behaviours in aqueous polymer solutions (Articolo in rivista)

Type

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

Label

• Relaxation dynamics and evidence of scaling behaviours in aqueous polymer solutions (Articolo in rivista) (literal)

Anno

• 2011-01-01T00:00:00+01:00 (literal)

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

• 10.1007/s00396-002-0825-6 (literal)

Alternative label

• Aliotta F.; Ponterio R. C.; Saija F.; Gapinski J.; Pochylski M. (2011)
  Relaxation dynamics and evidence of scaling behaviours in aqueous polymer solutions
  in Journal of molecular liquids (Print); Academic press Elsevier, Amsterdam (Paesi Bassi)
  (literal)

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

• Aliotta F.; Ponterio R. C.; Saija F.; Gapinski J.; Pochylski M. (literal)

Pagina inizio

• 105 (literal)

Pagina fine

• 111 (literal)

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

• 159 (literal)

Rivista

• Journal of molecular liquids (Rivista)

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

• 7 (literal)

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

• 1 (literal)

Note

• Scopu (literal)
• ISI Web of Science (WOS) (literal)

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

• CNR, IPCF, Messina, Italy Adam Mickiewicz Univ Poznan, Dept Phys, PL-61712 Poznan, Poland (literal)

Titolo

• Relaxation dynamics and evidence of scaling behaviours in aqueous polymer solutions (literal)

Abstract

• Some Brillouin scattering experiments on aqueous solution of Polyethylene glycol and Polyethylene glycol dimethyl ether are presented. In all the systems non-Debye relaxation processes have been detected, occurring on the picosecond time scale. The average values of the relaxation time distributions fail to follow simple Arrhenius behaviours. The temperature evolution of the relaxation time is adequately fitted after the adoption of a phenomenological Vogel-Fulcher-Tamman model. In spite of the different temperature and concentration dependences observed for each system, a unique scaling behaviour has been evidenced, at relatively low water contents, when the real and imaginary parts of the loss modulus are plotted as a function of a reduced reverse temperature, T0/T, being T0 the values of the arrest temperature as obtained by the Vogel- Fulcher-Tamman fits. The observation of a unique scaling law, for aqueous solutions of polymers characterized by the same average molecular weight but with different end groups, suggests for the establishment of similar hydrogen bonded local structures where water plays a main role, acting as a stabilizer bridging neighbouring polymer chains. The possible physical meanings of the phenomenological fitting parameters are discussed in the framework of recent approaches and the results are compared with literature reports on similar systems. (literal)

Editore

• Academic press Elsevier (Editore)

Prodotto di

• Proprietà Dinamiche e Strutturali in Sistemi Disordinati (MD.P01.014.004) (Modulo)
• Istituto per i processi chimico-fisici (IPCF) (Istituto)

Autore CNR

• FRANZ SAIJA (Unità di personale interno)
• ROSINA CELESTE PONTERIO (Unità di personale interno)
• FRANCESCO ALIOTTA (Unità di personale interno)

Incoming links:

Prodotto

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• Proprietà Dinamiche e Strutturali in Sistemi Disordinati (MD.P01.014.004) (Modulo)

Autore CNR di

• ROSINA CELESTE PONTERIO (Unità di personale interno)
• FRANCESCO ALIOTTA (Unità di personale interno)
• FRANZ SAIJA (Unità di personale interno)

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

• Journal of molecular liquids (Rivista)

Editore di

• Academic press Elsevier (Editore)