Transformation of cryovacuum condensates of ethanol near the glass transition temperature

A. Drobyshev, Алдияров Абдурахман Уалиевич, K. Katpaeva, Yevgeniy Korshikov, V. S. Kurnosov, Dmitriy Yurievich Sokolov

2013

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DOI 10.1063/1.4818634
Data confidence 70 medium
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Abstract

Thin films of cryovacuum condensates of ethanol formed by condensation of the gas on a cooled metal substrate are studied by infrared spectrometry and thermal desorption techniques. The main purpose was to examine dynamic relaxation processes near the glass transition temperature and the transition from orientationally disordered to orders states in thin ethanol cryocondensate films. It was found that ethanol cryocondensate films formed by condensation at T = 16 K are in an amorphous state (ASE). Increasing the sample temperature to T = 80 K leads to the transformation of the ASE into a structural glass. With further heating to T = 97 K, the structural glass is converted into a supercooled liquid and at T = 105 K, a plastic crystal is formed.