２‐ビニルピリジン‐ビニルエステル共重合体の四級アンモニウム塩によるカオリン懸濁液の凝集

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タイトル別名
  • Flocculation of aqueous kaoline suspension with quaternary ammonium salts of 2-vinylpyridine-vinylester copolymer.
  • 2 ビニルピリジン ビニルエステル キョウジュウゴウタイ ノ 4キュウ アンモ

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説明

Quaternary ammonium salts of 2-vinylpyridine-vinylester (2VP-VE) copolymers were prepared by the reactions of 2VP-VE copolymers with alkyl bromides and their flocculating abilities for 5% kaoline suspension were investigated by measuring sedimentation rate, sedimentation volume, and turbidity. All the quaternary salts of the 2VP-VE copolymers showed large flocculation abilities in the concentration range of 4-40 ppm. The flocculating ability of the salts of copolymer increased i) with increasing degree of ionization (α), ii) with increasing molecular weight of trunk copolymer, andiii) with increasing chain length of acyl group of ester function in the vinylester units. The pH value suitable for flocculating action was in the range of 1-12. The order in the flocculating abilities of the salts of 2VP-VE copolymers, obtained with the use of various alkyl bromides was as follows: C12H25>C2H5≈C8H17>C4H9. This order was identical with that for the increase in the amount of the copolymer adsorbed on kaoline particles.

収録刊行物

  • 高分子論文集

    高分子論文集 43 (6), 337-343, 1986

    公益社団法人 高分子学会

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