多孔質キトサンから再生したキチンとポリビニルアルコールとのブレンドフィルムの特性 Characterization of Blend Films of Chitin Regenerated from Porous Chitosan with Poly(vinyl alcohol)

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To regenerate chitin with high degree of <i>N</i>-acetylation and low degree of crystallinity, porous chitosan was <i>N</i>-acetylated with acetic anhydride in 10% aqueous methanol solution. Regenerated chitin (r-Ch) showed a quick dissolution in <i>N</i>, <i>N</i>-dimethylacetamide (DMA) containing 5% LiCl. In this solvent, r-Ch and poly (vinyl alcohol) (PVA) were compatible, and a series of blend films of r-Ch/PVA ranging in composition from 20/80 to 95/5 (w/w) were prepared from these solutions by coagulation in 2-propanol and subsequent drying. The miscibility of component polymers in the blends was investigated by differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) spectrophotometry. The glass transition temperature of the blends slightly shifted to the higher temperature region with increasing the r-Ch content, suggesting that the component polymers were partially miscible. The melting temperature and the heat of fusion of PVA in the blends decreased with decreasing the PVA content. These results denoted that the crystallinity of PVA decreased with increasing the r-Ch content, suggesting that the miscibility was higher at the higher r-Ch content region. FT-IR spectra indicated the presence of specific intermolecular interaction between the component polymers: hydrogen bonding between -OH groups.

収録刊行物

  • 繊維学会誌  

    繊維学会誌 54(4), 212-218, 1998-04-10 

    The Society of Fiber Science and Technology, Japan

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各種コード

  • NII論文ID(NAID)
    10002059344
  • NII書誌ID(NCID)
    AN00131651
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00379875
  • NDL 記事登録ID
    4459321
  • NDL 雑誌分類
    ZP33(科学技術--繊維工学・工業)
  • NDL 請求記号
    Z17-189
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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