Impedance spectroscopy of reactive polymers. 1

Francesco Bellucci, Maio Valentino, Tullio Monetta, Luigi Nicodemo, Jose Kenny, Luigi Nicolais, Jovan Mijovic

Research output: Contribution to journalArticle

Abstract

Dielectric measurements were utilized to follow the advancement of cure in an epoxy/amine formulation. In contrast to earlier studies, complex impedance was measured during cure and used to calculate ionic resistivity. By using complex impedance we were able to separate according to their frequency dependence the contributions to overall polarization from electrode blocking layers, migrating charges, and dipole relaxations. At any stage of cure, there is a unique frequency at which ionic resistivity can be singularly measured. Our approach does not involve trial-and-error frequency search and is conducive to the development of phenomenological models based on equivalent circuits. Excellent agreement was reported between the calculated values of normalized degree of cure obtained by dielectric and calorimetric measurements.

Original languageEnglish (US)
Pages (from-to)2519-2527
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume32
Issue number15
Publication statusPublished - Jan 1 1994

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ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics

Cite this

Bellucci, F., Valentino, M., Monetta, T., Nicodemo, L., Kenny, J., Nicolais, L., & Mijovic, J. (1994). Impedance spectroscopy of reactive polymers. 1. Journal of Polymer Science, Part B: Polymer Physics, 32(15), 2519-2527.