Email this article Internal Friction in Copolymer Vinylidenefluoride with Trifluoroethylene at Ferroelectric Phase Transition
- Authors: Verkhovskaya K.A.1, Korotkov L.N.2, Karaeva O.A.3
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Affiliations:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences
- Voronezh State Technical University
- ZAO Russaviainter
- Issue: Vol 64, No 4 (2019)
- Pages: 611-614
- Section: Lattice Dynamics and Phase Transitions
- URL: https://journal-vniispk.ru/1063-7745/article/view/194104
- DOI: https://doi.org/10.1134/S1063774519040254
- ID: 194104
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Abstract
Temperature dependences of internal friction Q–1, obtained at different heating rates of a copolymer VDF/TrFE (75/25) sample, are studied in the temperature range of 290–420 K at a frequency f ≈ 16 Hz. It is shown that the maximum of Q–1 observed in the vicinity of the ferroelectric phase transition (Tc = 393 K) is related to the motion of interphase boundaries and can be described within the low-frequency fluctuation mechanism of internal friction. The diffusion parameter σ of the ferroelectric phase transition is determined. The obtained σ value significantly exceeds the value that is due to possible microinhomogeneity of the chemical composition.
About the authors
K. A. Verkhovskaya
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Author for correspondence.
Email: vkira123@gmail.com
Russian Federation, Moscow, 119333
L. N. Korotkov
Voronezh State Technical University
Email: vkira123@gmail.com
Russian Federation, Voronezh, 394026
O. A. Karaeva
ZAO Russaviainter
Email: vkira123@gmail.com
Russian Federation, Voronezh, 394004
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