Diamine-Crosslinking of Poly(γ-glutamic acid) having 5-Membered Cyclic Dithiocarbonate Structures and its Application to Functional Adhesives

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  • Kozo Matsumoto
    Humanity-Oriented Science and Engineering, Kindai University
  • Yusuke Saitsu
    Humanity-Oriented Science and Engineering, Kindai University
  • Takumi Maeta
    Humanity-Oriented Science and Engineering, Kindai University
  • Yumi Oishi
    Humanity-Oriented Science and Engineering, Kindai University
  • Takeshi Endo
    Molecular Engineering Institute, Kindai University

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  • 5 員環ジチオカーボナート構造を持つポリ（γ- グルタミン酸）のジアミンによる架橋反応と機能性接着剤への応用
  • 5インカン ジチオカーボナート コウゾウ オ モツ ポリ(g-グルタミンサン)ノ ジアミン ニ ヨル カキョウ ハンノウ ト キノウセイ セッチャクザイ エ ノ オウヨウ

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Abstract

<p>Poly(γ-glutamic acid)s (DTC－γPGAs) having 5-Membered cyclic dithiocarbonate structures were synthesized, and their crosslinking along with adhesion property of the obtained materials were examined. DTC－γPGAs were prepared by addition of 5-hydroxymethyl-1,3-oxathiorane-2-thione (DTC－OH) to a dimethyl sulfoxide (DMSO) solution of γPGA in the presence of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide. Crosslinking of DTC－γPGAs was conducted by addition of 4,7,10-trioxa-1,13-tridecanediamine (TODA) as a crosslinker to an ethanol suspension leading gel formation.The polymer gels produced were cross-linked with thiourethane-linkage. Adhesion strengths were measured by coating the gels between two pieces of pig skin strip and bind together. Examination with varying TODA amount, DTC modification ratio, binding time revealed that DTC－γPGA (34/66) with 0.25 equivalent of TODA showed high T-type peering adhesion strength of 800N/m after 24 h binding.</p>

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