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Dielectric study of local relaxations in dendritic macromolecules

Dantras, Eric and Caminade, Anne-Marie and Majoral, Jean-Pierre and Lacabanne, Colette Dielectric study of local relaxations in dendritic macromolecules. (2002) Journal of Physics D: Applied Physics, 35 (1). 5-8. ISSN 0022-3727

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Official URL: http://dx.doi.org/10.1088/0022-3727/35/1/302

Abstract

The aim of this work is to characterize the dielectric properties of amorphous dendritic macromolecules as a function of architectural complexity. By combining thermostimulated currents and dynamic dielectric spectroscopy, the dielectric permittivity has been obtained as a function of temperature, in a very broad frequency range (10−4–106 Hz). Generations g = 0 to g = 2 were investigated. The molecular origin of the quasi-Debye mode observed for g = 0 at low temperature is common to all generations: localized reorientations of aldehyde end groups. The interactions with the phosphorus/sulfur (P = S) dipoles are probably responsible for the broadening pointed out in upper generations.

Item Type:Article
Additional Information:Thanks to IOP Publishing editor. The definitive version is available at http://dx.doi.org/10.1088/0022-3727/35/1/302 The original PDF of the article can be found at : http://iopscience.iop.org/
HAL Id:hal-01233429
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:25 Nov 2015 09:51

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