IR spectrometric studies of glass transition of freon CF3-CFH2

Authors

  • A.K. Shinbayeva IETP, Al Farabi Kazakh National University, Kazakhstan, Almaty
  • A.U. Aldiyarov IETP, Al Farabi Kazakh National University, Kazakhstan, Almaty
  • A.S. Drobyshev IETP, Al Farabi Kazakh National University, Kazakhstan, Almaty
  • A.E. Nurmukan IETP, Al Farabi Kazakh National University, Kazakhstan, Almaty
        143 59

Keywords:

freon, glass transition, IR spectra

Abstract

IR spectroscopic studies of structural-phase transformations in cryocondensed Freon films 134a were carried out. The investigations were carried out in the temperature range 16-100 K. Was discovered, that freon cryofilms 134a, formed at T = 16K, under heating in the temperature range from 70 to 90 K undergo multiple structural transformations of various nature. It is concluded that at a temperature of Tg = 72 K, a transition of the glassy state to a supercooled liquid (G-SCL) takes place. At a temperature near T = 78 K, crystallization of SCL into the state of an orientationally disordered plastic crystal begins. At a temperature Ttrans = 80 K, a second quasi-glass transition occurs from the state of the orientation glass to a plastic crystal with an ordered rotational subsystem. In the temperature range 83-85 K, a plastic crystal-monoclinic crystal phase transition is realized.

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How to Cite

Shinbayeva, A., Aldiyarov, A., Drobyshev, A., & Nurmukan, A. (2018). IR spectrometric studies of glass transition of freon CF3-CFH2. Recent Contributions to Physics (Rec.Contr.Phys.), 64(1), 39–47. Retrieved from https://bph.kaznu.kz/index.php/zhuzhu/article/view/620

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Section

Condensed Matter Physics and Materials Science Problems. NanoScience

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