Study of the Kinetics of the Phase Transition of the First Order in Tetracosane C24H50 by Fourier-Transform IR Spectroscopy
- Autores: Marikhin V.A.1, Gur’eva S.A.1, Myasnikova L.P.1, Volchek B.Z.2, Medvedeva D.A.2
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Afiliações:
- Ioffe Institute
- Institute of Macromolecular Compounds, Russian Academy of Sciences
- Edição: Volume 61, Nº 10 (2019)
- Páginas: 1785-1789
- Seção: Mechanical Properties, Physics of Strength, and Plasticity
- URL: https://journal-vniispk.ru/1063-7834/article/view/206264
- DOI: https://doi.org/10.1134/S1063783419100251
- ID: 206264
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Resumo
The kinetics of the development of the structural phase transition of the first order in monodisperse samples of tetracosane C24H50 has been studied using Fourier-transform IR spectroscopy. Temperature dependences of frequencies and intensities of rocking (in the region of ν ~ 720 cm–1) and bending (in the region of ν ~ 1470 cm–1) vibration modes of CH2 groups in trans methylene sequences in crystalline cores of elementary lamellae has been analyzed. It has been shown that the solid-phase transition of the first order develops by the heterogeneous mechanism in a narrow temperature interval ΔT ~ 2 K according to the theory of diffuse phase transitions of the first order and is caused by changes in the symmetry of crystallographic cells.
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Sobre autores
V. Marikhin
Ioffe Institute
Autor responsável pela correspondência
Email: v.marikhin@mail.ioffe.ru
Rússia, St. Petersburg, 194021
S. Gur’eva
Ioffe Institute
Email: v.marikhin@mail.ioffe.ru
Rússia, St. Petersburg, 194021
L. Myasnikova
Ioffe Institute
Email: v.marikhin@mail.ioffe.ru
Rússia, St. Petersburg, 194021
B. Volchek
Institute of Macromolecular Compounds, Russian Academy of Sciences
Email: v.marikhin@mail.ioffe.ru
Rússia, St. Petersburg, 199004
D. Medvedeva
Institute of Macromolecular Compounds, Russian Academy of Sciences
Email: v.marikhin@mail.ioffe.ru
Rússia, St. Petersburg, 199004
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