Radicals of Diphenylbutadiynes and Their Interactions with Diphenylpicrylhydrazyl. A Suggestion for the Nontopochemical Polymerization Mechanism of Diacetylene.

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  • Canizal Gerardo
    Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México
  • Burillo Guillermina
    Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México
  • Boldu Jose Luis
    Instituto de Física, Universidad Nacional Autónoma de México
  • Muñoz Eduardo
    Instituto de Física, Universidad Nacional Autónoma de México
  • Ogawa Takeshi
    Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México

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Other Title
  • Radicals of Diphenylbutadiynes and Thei

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Abstract

Electron Spin Resonance studies of diarylbutadiynes such as diphenylbutadiyne and p,p′-butadiynylenedi(methyl benzoate) have shown that these compounds contain free radicals at room temperature and that the number of radicals in the solid state increases with temperature. The color of diphenylpicrylhydrazyl (DPPH) disappears when these diacetylenes are added, indicating that the stable DPPH radicals react with the diacetylenes. The results suggest a probable initiation mechanism of the polymerization of the diacetylenes which do not undergo topochemical polymerization.

Journal

  • Polymer Journal

    Polymer Journal 29 (3), 230-233, 1997

    The Society of Polymer Science, Japan

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