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Phase diagram of poly(VDF-ter-TrFE-ter-CTFE) copolymers: Relationship between crystalline structure and material properties

Type
Articles dans des revues avec comité de lecture
Auteur
BARGAIN, François
301585 Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris [ESPCI Paris]
THUAU, Damien
300387 École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)
HADZIIOANNOU, Georges
301490 Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)
DOMINGUES DOS SANTOS, Fabrice
46191 Piezotech SAS [Piezotech SAS]
TENCÉ-GIRAULT, Sylvie
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/19736
DOI
10.1016/j.polymer.2020.123203
Date
2021
Journal
Polymer

Résumé

Depending on their CTFE content (from 0 to 10 mol %), poly(VDF-ter-TrFE-ter-CTFE), poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorotrifluoroethylene) copolymers, exhibit ferroelectric (FE) or relaxor ferroelectric (RFE) properties at room temperature. Solvent cast films of these terpolymers can crystallize in three orthorhombic phases: FE, DFE (Defective Ferroelectric) or RFE according to their amount of CTFE. The relative amount of each crystalline phase depends on the amount of CTFE and evolves after annealing. We study the dependence of the electric displacement−electric field (D−E) loop with the amount of CTFE and with annealing step. We observed a closely link between the remnant polarization, PR, and the fraction of (FE + DFE) crystalline phase. Macroscopic properties, studied using thermo-mechanical experiments (DSC and DMA) and dielectric spectroscopy, evolve continuously with the CTFE amount and are well correlated with the structural properties. Finally, a temperature versus mol% CTFE phase diagram is established and discussed in relation-ship with material properties.

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Description:
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Fin d'embargo:
2021-07-20
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  • High and Temperature-Independent Dielectric Constant Dielectrics from PVDF-Based Terpolymer and Copolymer Blends 
    THUAU, Damien; KALLITSIS, Konstantinos; HA, Sara; BARGAIN, François; SOULESTIN, Thibaut; PÉCASTAINGS, Gilles; TENCÉ-GIRAULT, Sylvie; DOMINGUES-DOS SANTOS, Fabrice; HADZIIOANNOU, Georges P. (Wiley, 2020)
    Relaxor ferroelectric polymers exhibit high k at their structural phase transition around room temperature. They are particularly attractive as gate dielectric in organic field effect transistor (OFET). Nevertheless, their ...
  • Thermal behavior of poly(VDF-ter-TrFE-ter-CTFE) copolymers: Influence of CTFE termonomer on the crystal-crystal transitions 
    BARGAIN, François; THUAU, Damien; PANINE, Pierre; HADZIIOANNOU, Georges; DOMINGUES DOS SANTOS, Fabrice; TENCE-GIRAULT, Sylvie (elsevier, 2019)
    Depending on their CTFE content (from 0 to 10 mol %), poly (VDF-ter-TrFE-ter-CTFE), poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorotrifluoroethylene) copolymers exhibit ferroelectric (FE) or relaxor ferroelectric ...
  • Introducing Functionality to Fluorinated Electroactive Polymers 
    KALLITSIS, Konstantinos; SOULESTIN, Thibaut; TENCÉ-GIRAULT, Sylvie; BROCHON, Cyril; CLOUTET, Éric; DOMINGUES-DOS SANTOS, Fabrice; HADZIIOANNOU, Georges P. (American Chemical Society, 2019)
    Fluorinated electroactive polymers (FEPs) are among the most interesting insulating materials for the production of organic electronic devices. Their ability to tune their response to an applied electric field makes them ...
  • Enhanced Electrocaloric Response of Vinylidene Fluoride–Based Polymers via One‐Step Molecular Engineering 
    LE GOUPIL, Florian; KALLITSIS, Konstantinos; TENCÉ‐GIRAULT, Sylvie; POURIAMANESH, Naser; BROCHON, Cyril; CLOUTET, Eric; SOULESTIN, Thibaut; DOMINGUE DOS SANTOS, Fabrice; STINGELIN, Natalie; HADZIIOANNOU, Georges (Wiley, 2020)
    Electrocaloric refrigeration is one of the most promising environmentally-friendly technologies to replace current cooling platforms—if a notable electrocaloric effect (ECE) is realized around room temperature where the ...
  • Influence of Field-Induced Phase Transition on Poly(Vinylidene Fluoride-Trifluoroethylene-Chlorotrifluoroethylene) Strain 
    LHERITIER, P.; VAXELAIRE, N.; TENCE-GIRAULT, Sylvie; DOMINGUES DOS SANTOS, F.; DEFAY, E. (American Physical Society, 2020)
    This work is focused on understanding the reasons behind the large electrostrictive strain of poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) terpolymer. Although a few explanations have been proposed ...

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