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Molecular mobility interpretation of the dielectric relaxor behavior in fluorinated copolymers and terpolymers

Capsal, Jean-Fabien and Dantras, Eric and Lacabanne, Colette Molecular mobility interpretation of the dielectric relaxor behavior in fluorinated copolymers and terpolymers. (2013) Journal of Non-Crystalline Solids, 363. 20-25. ISSN 0022-3093

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2012.12.008


Thermo Stimulated Current and Dynamic Dielectric Spectroscopy have been applied to investigate dielectric relaxation modes of poly(vinylidene-fluoride trifluoroethylene) copolymer and poly(vinylidene-fluoridetrifluoroethylene-chlorofluoroethylene) terpolymer. The aim of this work is to check the molecular origin of the ferroelectric relaxor behavior of the terpolymer. The combination of data obtained by both dielectricmethods allows us to describe themolecular mobility of the amorphous phase and the cooperativity of the order/disorder dipolar transition in the crystalline phase. The introduction of 1,1-chlorofluoroethylene units in the main chain induces an increase of the Cooperative Rearranging Region size associatedwith less ordered and smaller crystallites. This morphological evolution is responsible of a lack of cooperativity and it explains the dielectric relaxor behavior of the poly(vinylidene-fluoride-trifluoroethylene-chloroethylene) terpolymer.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Non-Crystalline Solids website : http://dx.doi.org/10.1016/j.jnoncrysol.2012.12.008
HAL Id:hal-00818215
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 - Toulouse INP (FRANCE)
Other partners > Institut National des Sciences Appliquées de Lyon - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:23 Apr 2013 12:32

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