Preparative Reaction of Highly Phosphorylated Poly(vinyl alcohol)

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Other Title
  • 高度にリン酸化されたポリビニルアルコールの生成反応

Abstract

The preparative reaction of highly phosphorylated poly(vinyl alcohol)(PVA) by means of ureaphosphoric acid-dimethylformamide(DMF) system has been studied. Phosphorylation was accelerated by urethanization of PVA occurred as side reaction. The addition of triethylamine was also effective for phosphorylation. Therfore, the most effective procedure of phosphorylation was as follows: PVA was first urethanized in urea-triethylamine system, and then phosphorylated by adding phosphoric acid. According to this method, approximately 100% of effective hydroxyl groups in PVA could be phosphorylated. The reason why the urethanization has been effective for phosphorylation was that the urethanization brought about an increased solubility of PVA in the reaction medium.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1972 (7), 1305-1309, 1972-07-10

    The Chemical Society of Japan

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