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Freezing behaviour of polymer gels studied by DSC and environmental SEM.

Author(s) : MURASE N., INOUE T., RUIKE M., et al.

Summary

It was found by differential scanning calorimetry (DSC) that anomalous ice crystallization during rewarming observed with gels with the proper density of crosslinks is a characteristic of nonequilibrium freezing, and it disappears after equilibrium freezing. This mechanism still remains unclear, but it depends on the density of crosslinks as well as on the freezing conditions. It reflects the different extent of flexibility of the polymer network. This is actually confirmed by the observation using an environmental scanning electron microscope (ESEM). The change was more remarkable with gels with lower crosslink densities than those with higher crosslink densities.

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Details

  • Original title: Freezing behaviour of polymer gels studied by DSC and environmental SEM.
  • Record ID : 2000-1402
  • Languages: English
  • Source: 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Publication date: 1999/09/19

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