Synthesis of Poly(vinyl alcohol)s Having TEMPO Units in Their Pentant Groups

DOI 1 Citations 5 References

Bibliographic Information

Other Title
  • ペンダントグループにＴＥＭＰＯ構造をもつポリビニルアルコールの合成

Abstract

A condensation reaction of p-formylbenzoic acid and 4-hydroxy-2,2,6,6-tetramethylpiperidine using 1,1'-carbonyldiimidazole in DMSO at 80°C for 48 h produced the ester (p-FB-TEMP-H) in a 64% yield. The acetalation of the formyl group of p-FB-TEMP-H with poly(vinyl alcohol) (PVA) in the presence of acetic acid as an acid catalyst yielded the corresponding acetals of PVA and p-FB-TEMP-H (PVA-p-FB-TEMP-H). The introduction rates of p-FB-TEMP-H onto PVA were calculated from 1H NMR results of the products. The rates of the acetalation based on PVA monomer unit were about 1.5-19%. The oxidation of PVA-p-FB-TEMP-H with H2O2 using sodium tungstate as a catalyst converted the piperidinine ring into a 2,2,6,6-tetramethyl piperidine-N-oxyl (TEMPO) structure. The ESR measurements of the polymer radicals obtained showed strong signals in good solvents for PVA but not in poor solvents for PVA. These results indicate the introduction of a TEMPO structure onto PVA.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 66 (11), 524-526, 2009

    The Society of Polymer Science, Japan

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Keywords

Details 詳細情報について

  • CRID
    1390282681502894592
  • NII Article ID
    130004489205
  • DOI
    10.1295/koron.66.524
  • ISSN
    18815685
    03862186
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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