<b>Synthesis of Water-Stable Copolymers Containing Isothiocyanate Moiety and Their Nucleophilic Reaction and Cross-Linking by Diamine in Water </b>

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  • Seto Ryota
    Molecular Engineering Institute, Kinki University
  • Matsumoto Kozo
    Molecular Engineering Institute, Kinki University Department of Biological & Environmental Chemistry, Kinki University
  • Endo Takeshi
    Molecular Engineering Institute, Kinki University

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Other Title
  • <b>水に安定なイソチオシアナート構造をもつ共重合体の合成と水中での求核剤との反応及びジアミンによるネットワーク化 </b>
  • 水に安定なイソチオシアナート構造をもつ共重合体の合成と水中での求核剤との反応及びジアミンによるネットワーク化
  • ミズ ニ アンテイ ナ イソチオシアナート コウゾウ オ モツ キョウ ジュウゴウタイ ノ ゴウセイ ト スイチュウ デ ノ キュウカクザイ ト ノ ハンノウ オヨビ ジアミン ニ ヨル ネットワークカ

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Description

Water-dispersible copolymers containing isothiocyanate moiety, poly(ITEMA-co-AAm) were synthesized by radical copolymerization of 2-isothiocyanatoethyl methacrylate (ITEMA) and acryl amide (AAm). After checking of water solubility of copolymers carrying various compositions, only [ITEMA (7 mol%)-co-AAm (93 mol%)] is dispersible in water. Isothiocyanate groups in the copolymer were stable in water for one week at room temperature. To cross-link the copolymers in water, 1,6-hexamethylenediamine was added into their aqueous dispersion to obtain the corresponding networked polymers. After that, cross-linked copolymer was obtained with keeping its water-dispersibility. Further, hydrogel was obtained by heating the copolymer dispersion at 100 ℃ for 30 min to be insoluble in any solvents. At higher temperature (at 100 ℃), isothiocyanate groups reacted with water to give amino groups and subsequently obtained amino groups reacted with isothiocyanate groups to form networked hydrogel. Based on these results, poly(ITEMA-co-AAm) may be useful as key precursor for forming networked polymers in water.

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