Relaxation processes in glassy selenium

Kabanskaya, A. N.; Киселев, М. Р.; Vargunin, A. I.; Kozyukhin, S. A.; Lomovskoi, V. A.

doi:10.1134/s0020168512030077

Cited by 6 publications

(2 citation statements)

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“…Recently, the analysis of the internal friction spectra has been widely used to study materials differing in chemical structure [10][11][12][13][14].…”

Section: Methodsmentioning

confidence: 99%

Internal-friction spectra of poly(vinyl alcohol) with various molecular masses

2015

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Dissipative effects in poly(vinyl alcohol) films with different molecular masses and degrees of hydration have been investigated with the use of relaxation spectrometry. The mechanical loss peaks in the internal friction spectrum reflect two relaxation transitions (α and β peaks) and one first order phase transi tion (δ peak). It has been found that a decrease in the degree of hydration and an increase in the crystallinity of poly(vinyl alcohol) substantially raises the α transition temperature. The α peak shifts to higher tempera tures as the molecular mass grows. The position of the β peak in the spectrum is independent of the molecular mass, but changes with the degree of hydration. A sharp drop of the oscillation frequency in the region of the α transition and a smooth decrease in frequency in the temperature range of the β transition have been recorded. It has been found that the shear modulus defect determined from the frequency in the region of the α transition is independent of the molecular mass and degree of hydration of poly(vinyl alcohol).

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“…Recently, the analysis of the internal friction spectra has been widely used to study materials differing in chemical structure [10][11][12][13][14].…”

Section: Methodsmentioning

confidence: 99%

Internal-friction spectra of poly(vinyl alcohol) with various molecular masses

2015

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“…Для пружних матеріалів tgδ дуже малий, тому модуль пружності виражається як відношення механічної напруги до деформації. [5,9,10].…”

Section: методика вимірюваньunclassified

Investigation of the processes of softening and crystallization of glassy selenium by dynamic mechanical analysis method

Біланич¹,

Csach²,

Flachbart³

et al. 2018

Sci.Herald.Uzh.Univ.Ser.Phys

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Досліджено температурні залежності пружного модуля і тангенса кута механічних втрат скловидного та полікристалічного селену в інтервалі розм'якшення та кристалізації. Вимірювання проведено в режимі вимушених коливань на частоті 0.5 Гц з допомогою пристрою Q400 TMA. Виявлено ефекти температурного розм′якшення скла та зростання пружного модуля при кристалізації в інтервалі T>Tg. Визначено параметри релаксаційного процесу скловидного селену при розм'якшенні.

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