Study on the Improvement in the Dyeabllity of Poly-L-Leucine Fiber-Copoly (L-Leu, L-Met-S-methylsulfonium) Fiber

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  • NISHI Norio
    Department of Polymer Science, Faculty of Science, Hokkaido University
  • YOSHIZUMI Makoto
    Department of Polymer Science, Faculty of Science, Hokkaido University
  • NOGUCHI Junzo
    Department of Polymer Science, Faculty of Science, Hokkaido University

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Other Title
  • ポリ‐Ｌ‐ロイシン繊維の染色性改善　　コポリ（Ｌ‐ロイシン，Ｌ‐メチオニン‐Ｓ‐メチルスルホニウム）繊維
  • ポリーL ロイシン センイ ノ センショクセイ カイゼン コポリ L ロイシン

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Description

The viscosity of the benzene solution of copoly (L-Leu, L-Met 97: 3) was reduced by the addition of ca. 8% of dichloroacetic acid (v/v of benzene). Fine fibers of the copoly (L-Leu, L-Met 97: 3) were obtained by spinning the viscous solution in i-propylalcohol at 65°C, stretching the fibers in hot water at 65°C and then treating them with hot roller at 110°C. This fiber was converted into the fiber of copoly (L-Leu, L-Met-S-methylsulfonium) by the treatment with 3% dimethyl sulfate in dioxane at 100°C for 2hr. The coexistence of a-helix and β-coil structures in the both fibers was found by means of X-ray diffraction and infrared spectra. The S-methylated fiber contains more a-helix structures than the original fiber owing to the transition from β-coli to α-helix during the treatment with dioxane. This structural change provides a decrease in the tenacity of the fiber, making the fiber a long-elongation type. Compared to the original fiber, the S-methylated fiber has a remarkably high dyeability to acidic dyes.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 34 (5), 383-388, 1977

    The Society of Polymer Science, Japan

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