Transformation of cryovacuum condensates of ethanol near the glass transition temperature
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Аннотация
Infrared spectrometry and thermodesorption experiments with thin films of ethanol cryovacuum condensates formed during condensation of the gas at different pressures and temperatures on a cooled metal substrate. The main purpose was to study the dynamical relaxation processes in the vicinity of the glass transition temperature and the transition from orientationally disordered to ordered states in thin films of ethanol cryocondensates. It was found that the films of ethanol cryocondensates formed during the condensation at the T = 16 K were in an amorphous state (ASE). An increase in the sample temperature leads at T = 80 K to a transformation of the ASE into a structural glass. Further heating to T = 97 K was ac-companied by a transformation of the structural glass into a supercooled liquid, and then, at T = 105 K to a plastic crystal.
Библиографиялық сілтемелер
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3. Kohl I., Bachmann L., Hallbrucker A., Mayer E. and Loertingab T. Liquid-like relaxation in hyperquenched water at r140 K // Phys. Chem. Chem. Phys. - 2005. – Vol. 7. –P. 3210-3220.
4. Johari G.P. Water’s Tg endotherm, sub-Tg peak of glasses and Tg of water // J. Chem. Phys. – 2003. – Vol.119. – P. 2935-2937.
5. Yue Y. and Angell C. Clarifying the glass-transition behaviour of water by comparison with hyperquenched inorganic glasses // Nature. – 2004. – Vol. 427. – P. 717-720.
6. Aldiyarov, M. Aryutkina, A. Drobyshev, M. Kaikanov, and V. Kurnosov Investigation of dynamic glass transitions and structure transformations in cryo-vacuum condensates of ethanol // Fiz. Nizk. Temp. – 2009. – Vol.35. – P. 333-338. [LowTemp. Phys. 35, 251 (2009)].
7. Drobyshev A., Aldiyarov A., Kurnosov V. and all Thermal desorption and IR spectrometric investigation of polyamorphic and polymorphic transformations in cryovacuum condensates of water // Fiz. Nizk. Temp. – 2007. – Vol. 33. – P. 627-638. [Low Temp. Phys.33, 472 (2007)].
8. Aldiyarov A., Aryutkina M., Drobyshev A., Kurnosov V. Infrared spectroscopy of ethanol in cryomatrix of nytrogen in different concentration ratios // Fizika Nizkikh Temperatur, 2011, 37 (6). - Pp. 659-669. [LowTemp.Phys. 37, No. 6 (2011)].
9. Ramos M., Viera S., Bermejo F., Davidowski J., Fischer H., Schober H., Gonzales H., Loong C., and D. Price Quantitative Assessment of the Effects of Orientational and Positional Disorder on Glassy Dynamics // Phys. Rev.Lett. – 1997. – Vol. 78. – P. 82.
10. Haida O., Suga H., and Seki S. Calorimetric study of the glassy state. XII. Plural glass-transition phenomena of ethanol // J. Chem. Termodyn. – 1997. – Vol.9. – P. 1133-1148.
11. .Drobyshev A., Aldiyarov A., Kurnosov V., Tokmoldin N. Thermally stimulated transformations in cryovacuum water ices // Low Temp. Phys. – 2007. - Vol.33. – Is.4. - P. 355-361.
12. Drobyshev A., Abdykalykov K., Aldiyarov A., Kurnosov V., Tokmoldin N. IR spectra of water polyaggregates in a nitrogen cryomatrix // Low Temp. Phys. – 2007. – Vol. 33. – P. 699-703.
13. Talon C., Ramos M., Vieira S., Guello G., Bermejo F., Griado A., Senent M., Bennington S., Fischer H., and Schober H. Low-temperature specific heat and glassy dynamics of a polymorphic molecular solid // Phys. Rev. B. – 1998. – Vol. 58. – P. 745.
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15. Bakke J.M. and Bjerkeseth L.H. Rotational-isomerism around the C-O bond in saturated acyclic alcohols - assignment of the experimental IR hydroxyl stretch bands using semiempirical mo and ab-initio calculations // Journal of molecular structure. – 1997. - Vol. 407(1). - P. 27-38.
16. Ramos M.A., Shmyt'ko I., Arnautova E., Jiménez-Riobóo R., Rodriguez-Mora V., Vieira S., and Capitán M.J. On the Phase Diagram of Polymorphic Ethanol: Thermodynamic and Structural Studies // J. Non-Cryst. Solids. – 2006. – Vol. 352. – P. 4769.
Жүктелулер
Как цитировать
Aldiyarov, A., Kadylbek, S., & Zhumabayeva, S. (2014). Transformation of cryovacuum condensates of ethanol near the glass transition temperature. ҚазНУ Хабаршысы. Физика сериясы, 49(2), 48–56. вилучено із https://bph.kaznu.kz/index.php/zhuzhu/article/view/772
Шығарылым
Бөлім
Теплофизика и теоретическая теплотехника
