ポリビニルアルコールの末端カルボキシル基に関する研究

DOI

書誌事項

タイトル別名
  • Studies on the Carboxyl End Group of Polyvinyl Alcohol
  • I. The Quantitative Determination of Carboxyl Groups and its Content in Relation to the Conditions of the Preparation
  • 第1報ポリビニルアルコールのカルボキシル基の定量確認と製造法を異にしたポリビニルアルコールのカルボキシル基結合数について

抄録

It is shown that the carboxyl groups of polyvinyl alcohol may be quantitatively determinedby conductometric titration. The dissociation constant of the carboxyl group is found to be1.6×10-5 by electrometric titration. By heating polyvinyl alcohol with carboxyl groups in anaqueous solution of dilute hydrochloric acid the formation of lactone rings is observed. Fromthe mechanism of the polymerization of vinylacetate the carboxyl seems to be attached to apolyvinyl alcohol molecule as an end group. Polyvinyl alcohol fractions prepared from polyvinylacetate obtained by the bulk polymerization contain on the average one carboxyl groupper one polymer molecule, whereas those from polyvinyl acetate obtained by the solutionpolymerization in solvents with larger transfer constants such as acetone and ethanol contain 0.2 carboxyl group per one polymer molecule.

収録刊行物

  • 高分子化學

    高分子化學 14 (146), 284-290, 1957

    公益社団法人 高分子学会

詳細情報 詳細情報について

  • CRID
    1390282681497194752
  • NII論文ID
    130003835247
  • DOI
    10.1295/koron1944.14.284
  • ISSN
    18848079
    00232556
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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