Study of the Kinetics of the Phase Transition of the First Order in Tetracosane C24H50 by Fourier-Transform IR Spectroscopy


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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.

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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