キトサン存在下でのメタクリル酸のリビングラジカル重合

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書誌事項

タイトル別名
  • Living Radical Polymerization of Methacrylic acid in the Presence of Chitosan
  • キトサン ソンザイカ デ ノ メタクリルサン ノ リビング ラジカル ジュウゴ
公開日
1981
DOI
  • 10.1295/koron.38.821
公開者
公益社団法人 高分子学会

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説明

The polymerization of sodium methacrylate (MAA·Na) was kinetically investigated in aqueous solution in the presence of chitosan acetate salt (CS·AcOH) using potassium persulfate (KPS) as an initiator. The polymerization rate (Rp) in the presence of CS·AcOH equimolor to MAA·Na, was expressed as follows.<BR>Rp=k [KPS]0 [MAA·Na]0.8 for [KPS] <3.5×10-3mol/l<BR>Rp=k [KPS]1.8 [MAA·Na]0.8 for [KPS] >3.5×10-3mol/l<BR>Molecular weight of poly (methacrylic acid) (PMAA) obtained at polymerization temperature below 60°C with the initiator of low concentration increased linearly with increasing the conversion. The polymerization proceeded with rapid initiation, succesive propagation and no termination. These results as well as analysis on the end group of PMAA indicated that an initiation occurred at reducing end-groups of chitosan, and that the propagation reaction proceeded among MAA molecules bound on chitosan molecule by the ionic and hydrophobic binding.

収録刊行物

  • 高分子論文集

    高分子論文集 38 (12), 821-827, 1981

    公益社団法人 高分子学会

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