Journal of Radioanalytical and Nuclear Chemistry

, Volume 211, Issue 1, pp 119–126 | Cite as

Positron annihilation lifetime studies of sol-gel transition of carrageenan gels

  • Y. Wakabayashi
  • K. Ito
  • H. L. Li
  • Y. Ujihira
  • H. Hashimoto
  • H. Matsui
  • A. Chiba
  • Y. C. Jean
Contributed Papers
Received:

Abstract

Positron annihilation lifetime measurement was applied to study the sol-gel transition of anionic polysaccharide aqueous solutions in terms of free-volume parameters the size, intensity, and size distribution of free volumes of the gelation of K-formk-carrageenan solutions as a function of temperature. Slight variations of free volume size and intensity against temperature were observed near 295 K. The correlation of free-volume data with other physical properties vibrational spectra (IR and Raman), conductivity, SAXS, elastic measurement, differential scanning calorimetry were investigated to understand the mechanism of sol-gel transition of carrageenan.

Keywords

Aqueous Solution Polysaccharide Differential Scanning Calorimetry Calorimetry Free Volume 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Akadémiai Kiadó 1996

Authors and Affiliations

  • Y. Wakabayashi
    • 1
  • K. Ito
    • 1
  • H. L. Li
    • 1
  • Y. Ujihira
    • 1
  • H. Hashimoto
    • 2
  • H. Matsui
    • 2
  • A. Chiba
    • 2
  • Y. C. Jean
    • 3
  1. 1.Research Center for Advanced Science and TechnologyThe University of TokyoTokyo(Japan)
  2. 2.Department of Applied PhysicsWaseda UniversityTokyo(Japan)
  3. 3.Department of ChemistryUniversity of Missouri-Kansas CityKansas City(USA)

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