English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/7544
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Hydration water dynamics in solutions of hydrophilic polymers, biopolymers and other glass forming materials by dielectric spectroscopy

AuthorsCerveny, Silvina CSIC ORCID ; Alegría, Ángel CSIC ORCID ; Colmenero de León, Juan CSIC ORCID
Differential scanning calorimetry
Carrier relaxation time
Issue Date21-Feb-2008
PublisherAmerican Institute of Physics
CitationAIP Conf. Proc. 982: 706-711 (2008)
AbstractBroadband dielectric spectroscopy (10^−2 Hz–10^6 Hz) and differential scanning calorimetry measurements have been performed to study the molecular dynamics of several water solutions in the water concentration region from 30 wt% to 50 wt% and in the temperature range from 140 to 250 K. The analysis of the dielectric data in these water solutions revealed an universality in the temperature dependence of the relaxation times at temperatures lower and higher than the calorimetric glass transition (Tg). At temperatures lower than Tg, an universal Arrhenius behaviour with an average activation energy of (0.54 ± 0.10) eV is obtained, whereas at temperatures higher than Tg an universal VFT (Vogel-Fulcher-Tamman) behaviour is found.
Description6 pages.-- PACS nrs.: 77.22.Gm, 61.41.+e, 64.70.P-.-- Communication presented at the 5th International Workshop on Complex Systems (September 25-28, 2007, Sendai, Japan).
Publisher version (URL)http://dx.doi.org/10.1063/1.2897882
Appears in Collections:(CFM) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.