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Specifics of n-Alkanes Polymorphism during Temperature Phase Transitions
Russian version
Gureva S. A. 1, Marikhin V. A. 1, Vlasova E. N. 2
1Ioffe Institute, St. Petersburg, Russia
2Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
Email: swet.gurjewa@gmail.com
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The differences in the kinetics of the polymorphic transformation of crystallographic phases of n-alkanes of different parities: tricosane C23H48 and tetracosane C24H50 were studied using Fourier transform infrared spectroscopy. It has been established that a first-order structural phase transition occurs with a change in the symmetry type of the initial orthorhombic or triclinic subcells to hexagonal ones through the formation of a number of intermediate rotator phases (RI, RII, RV) depending on the symmetry of the molecules (cis or trans). Keywords: n-alkanes, lamellae, phase transitions, rotator phases, IR spectroscopy.
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