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Hydration and Dynamics of Polymeric Materials in Aqueous Solultion

le 10 juin 2013
13h00

Séminaire, du Pr Toshiyuki Shikata (Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Japon) à l'invitation du PPSM.

Résumé:
Because water molecules have a relatively large permanent electric dipole moment, their whole molecular motions are clearly detectable using extremely high frequency dielectric spectrum measurements.  Moreover, free and hydrated water molecules in aqueous solutions are easily distinguished from dielectric spectra.  By use of the extremely high frequency dielectric techniques, one can precisely determine hydration numbers of some polymeric materials, e.g., poly(ethylene glycol) and poly(vinyl alcohol)) as functions of temperature. Simultaneously, information on segment motions for the polymers in aqueous solution is also detectable.  Hydration behavior and dynamics of such the polymeric materials in aqueous solution will be shown.
Type :
Séminaires - conférences
Contact :
Robert Pansu
Lieu(x) :
Campus de Cachan
Auditorium D. Chemla - Bâtiment IDA
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