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  • 1 The University of Tokyo Research Center for Advanced Science and Technology 4-6-1 Komaba, Meguro-ku 153 Tokyo (Japan)
  • 2 University of Missouri-Kansas City Department of Chemistry 64110 Kansas City Missouri (USA)
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The variations of size, intensity, and size distribution of free volumes generated in the network of molecular chains of gelatin at the sol-gel transition were studied by means of the positron annihilation lifetime technique. Although variation in average free-volume radius was not recognized, a variation of free-volume content was observed at the sol-gel transition point of gelatin with an addition of saccharose.