Binary glass-forming materials: Mixtures of sorbitol and glycerol

Kalyan Duvvuri; Ranko Richert

doi:10.1021/jp031366b

Binary glass-forming materials: Mixtures of sorbitol and glycerol

Kalyan Duvvuri, Ranko Richert

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

The dynamics of sorbitol/glycerol mixtures across the entire composition range has been characterized by dielectric relaxation measurements for frequencies between 10 mHz and 10 MHz. We explore the gradual change in the glass transition temperature (T _g), fragility (m), nonexponentiality (β _KWW), and occurrence of a secondary Johari-Goldstein type relaxation as a function of the mole fraction. Regarding the crystallization tendency at room temperature and the freezing of molecular motion below T _g, these mixtures differ qualitatively from aqueous solutions of sugars or other polyols.

Original language	English (US)
Pages (from-to)	10451-10456
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	108
Issue number	29
DOIs	https://doi.org/10.1021/jp031366b
State	Published - Jul 22 2004

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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AB - The dynamics of sorbitol/glycerol mixtures across the entire composition range has been characterized by dielectric relaxation measurements for frequencies between 10 mHz and 10 MHz. We explore the gradual change in the glass transition temperature (T g), fragility (m), nonexponentiality (β KWW), and occurrence of a secondary Johari-Goldstein type relaxation as a function of the mole fraction. Regarding the crystallization tendency at room temperature and the freezing of molecular motion below T g, these mixtures differ qualitatively from aqueous solutions of sugars or other polyols.

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Binary glass-forming materials: Mixtures of sorbitol and glycerol

Abstract

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