Ferroelectricity in VF2based copolymers
Authors:
- 1 February 1988
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 78 (1) , 151-158
Abstract
Introduction of monomers of tri-fluoro or tetra-fluoro-éthylene (F3E or F4E) along the chain of polyvinylidene fluoride (PVF2 is able to induce spontaneous crystallization in a ferroelectric structure. Such copolymers exhibit a ferroelectric transition to a disordered para-electric phase. After a short review concerning the phase diagrams and the piezo and pyroelectric properties, we present recent results on the ferroelectric behaviour of VF2-F3E copolymers and on their first order ferroelectric transition. This investigation is based on dielectric measurements, second harmonic generation of light, × ray diffraction, thermal expansion measurements and Brillouin spectroscopy. Interpretation emphasizes the composite structure of these semi crystalline materials.Keywords
This publication has 15 references indexed in Scilit:
- Effects of electron irradiation and annealing on ferroelectric vinylidene fluoride-trifluoroethylene copolymersJournal of Applied Physics, 1987
- The role of molecular defects on the structure and phase transitions of poly(vinylidene fluoride)Polymer, 1987
- Effect of thermal and solution history on the Curie point of VF2-TrFE random copolymersJournal of Applied Physics, 1986
- N.m.r. study of the ferroelectric phase transition in a 7030mol% copolymer of vinylidene fluoride (VF2) and trifluoroethylene (TrFE)Polymer, 1985
- On Green Emission in CdInGaS4Japanese Journal of Applied Physics, 1985
- Structural study on ferroelectric phase transition of vinylidene fluoride-trifluoroethylene copolymers (III) dependence of transitional behavior on VDF molar contentFerroelectrics, 1984
- Structure and ferroelectric phase transition of vinylidene fluoride-trifluoroethylene copolymers: 2. VDF 55% copolymerPolymer, 1984
- Crystallographic changes characterizing the Curie transition in three ferroelectric copolymers of vinylidene fluoride and trifluoroethylene: 1. As-crystallized samplesPolymer, 1983
- Ferroelectric transition in a copolymer of vinylidene fluoride and tetrafluoroethyleneMacromolecules, 1983
- Ferroelectric phase transition in a copolymer of vinylidene fluoride and trifluoroethyleneFerroelectrics, 1981