Glass Transition of Inorganic and Adenosine Polyphosphates

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  • KAWAI Kiyoshi
    Department of Food Science and Technology, Tokyo University of Fisheries
  • SUZUKI Toru
    Department of Food Science and Technology, Tokyo University of Fisheries
  • HAGIWARA Tomoaki
    Department of Food Science and Technology, Tokyo University of Fisheries
  • TAKAI Rikuo
    Department of Food Science and Technology, Tokyo University of Fisheries

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Other Title
  • ポリリン酸塩及びアデノシン系リン酸エステルのガラス転移に関する研究
  • ポリ リンサンエン オヨビ アデノシンケイ リンサン エステル ノ ガラス テンイ ニ カンスル ケンキュウ

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The thermal behaviors of Pyro-and Tripoly-phosphate solutions and its freeze-dried solid were investigated using DSC. In this study, ATP related compounds, which are similar on structure to tripolyphosphate, were also investigated. It was found that every phosphate solution system is freeze-concentrated, and finally not precipitate but turns to glassy state. And also, its freeze-dried samples were in glassy state. From moisture dependence of their glass transition temperature, the state diagrams, including glass transition line, were constructed. The glass transition temperatures Tg' (-15℃〜-39℃) of their maximum freeze concentrated solution were found to be relatively higher in comparison with those of sugar solutions.

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