Internal Friction in Copolymer Vinylidenefluoride with Trifluoroethylene at Ferroelectric Phase Transition

Autor:	L. N. Korotkov, O. A. Karaeva, K. A. Verkhovskaya
Rok vydání:	2019
Předmět:	Phase transition Materials science Condensed matter physics Diffusion Copolymer General Materials Science Interphase General Chemistry Atmospheric temperature range Condensed Matter Physics Chemical composition Ferroelectricity Internal friction
Zdroj:	Crystallography Reports. 64:611-614
ISSN:	1562-689X 1063-7745
DOI:	10.1134/s1063774519040254
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::26a0ad6af5685c778d8359e913f27f02 https://doi.org/10.1134/s1063774519040254 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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