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Solidification properties of polyalcohol aqueous solution studied by DSC.

[In Chinese. / En chinois.]

Author(s) : HU T., GAO C., ZHOU G., et al.

Type of article: Article

Summary

In order to examine possible relations between freezing properties and the number of hydroxyl groups in solute molecules, a differential scanning calorimeter (Pyris-Diamond DSC) was employed to study the thermal behaviour of polyalcohol aqueous solution, such as the hydration behaviour glass transition, and devitrification. The experimental results show that at the low concentration hydration behaviour have no disciplinarians. However, at high concentrations, they accreted as the concentration increased. At moderately low concentrations, the aqueous solutions formed a partially an amorphous glassy state. The temperature of partially glass transition did not change with solution concentration. But, at high concentrations, the aqueous solutions formed completely an amorphous glassy state and the glass transition temperature increased with concentration. The distinct difference in glass transition and devitrification temperature of five polyalcohols reflected the weak nature and power in the aspects of glass transition ability.

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Pages: 38-41

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 2006-1611
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 26 - n. 105
  • Publication date: 2005/09

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