On the features of cooperative mobility in the amorphous phase of ferroelectric polymers
- 118 Downloads
Ferroelectric poly(vinylidene fluoride–hexafluoropropylene) films were prepared by low-temperature crystallization from the acetone and ethyl acetate solutions. Crystalline modifications of the obtained films were different (mixture of β- and γ-phases in case of acetone and predominantly α-phase in case of ethyl acetate). The dielectric spectroscopy studies showed that the relaxation strength of the main relaxation above the glass transition temperature (associated with the cooperative mobility in the amorphous phase) unusually increases with increasing temperature. Thermodynamic relationships suggest that this effect may be explained by assuming that there is a certain long-range order in the amorphous phase. This order may be due to the presence of the local field near the polar planes of the crystals, which form ferroelectric domains.
KeywordsFerroelectric polymers Crystalline polymers PVDF Crystallization Dielectric relaxation
The authors would like to thank V.S. Khurdin for the help in the measurements and data analysis.
The work was supported by the Russian Foundation for Basic Research (RFBR 18-03-00493).
Compliance with ethical standards
Conflicts of interest
The authors declare that they have no conflict of interest.
- 1.Wang TT, Herbert JM, Glass AM (eds) (1988) The application of ferroelectric polymers. Blackie, GlasgowGoogle Scholar
- 2.Nalva HS (ed) (1995) Ferroelectric polymers—chemistry, physics and applications. Marcel Dekker Inc, New YorkGoogle Scholar
- 6.Markose S, Patange SR, Raja S, Jain A, Elias B (2013) Experimental study on dimension effect of PVDF film on energy harvesting. Int J Adv Res Electrical Electron Instrum Eng 2:270–278Google Scholar
- 11.Vogel H (1921) The law of relation between the viscosity of liquids and the temperature. J Amer Ceram Soc 8:339–355Google Scholar
- 12.Kochervinskii VV, Kiselev DA, Malinkovich MD, Pavlov AS, Malyshkina IA (2015) Local piezoelectric response, structural and dynamic properties of ferroelectric copolymers of vinylidene fluoride–tetrafluoroethylene. Colloid Polym Sci 293:533–543. https://doi.org/10.1007/s00396-014-3435-1 CrossRefGoogle Scholar
- 19.Frohlich H (1958) Theory of dielectrics: dielectric constant and dielectric loss. Clarendon Press, OxfordGoogle Scholar
- 20.Kremer F, Schonhals A (eds) (2003) Broadband dielectric spectroscopy. Springer-Verlag, Berlin HeidelbergGoogle Scholar
- 21.Blythe AR, Bloor D (2005) Electrical properties of polymers. Cambrige University Press, New YorkGoogle Scholar
- 23.Kochervinskii VV, Malyshkina IA, Pavlov AS, Pakuro NI, Bessonova NP, Shmakova NA, Bedin SA, Chubunova EV, Lebedinskii YY (2015) An effect of the electrode material on space charge relaxation in ferroelectric copolymers of vinylidene fluoride. J. Appl. Phys 118(24):244102 (1–9). https://doi.org/10.1063/1.4938016 CrossRefGoogle Scholar