Electrical Relaxation in Acid-Form Nafion

Abstract

Electrical relaxation studies of acid-form NAFION-117 membranes dried in situ at 3 80K in vacuum have been carried out. Significant electrical conductivity is found and the data are found to be non-Arrhenius. The results are converted to the electrical modulus representation and a conductivity relaxation is observed. A stretched exponential is best-fit to the conductivity relaxation and again, non-Arrhenius behavior is observed for the peak position. Finally, at low temperatures, a new dielectric relaxation peak is found which has an activation enthalpy of about 0.57 eV (13 kcal/mol). This relaxation is analogous to the Gamma-relaxation observed in mechanical relaxation studies.

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Document Details

Document Type
Technical Report
Publication Date
Apr 16, 1993
Accession Number
ADA263558

Entities

People

  • John J. Fontanella
  • M. C. Wintersgill
  • M. G. Mclin

Organizations

  • United States Naval Academy

Tags

DTIC Thesaurus Topics

  • Capacitance
  • Conductivity
  • Dielectric Permittivity
  • Electrical Conductivity
  • Electrical Properties
  • Enthalpy
  • Equations
  • Films
  • Fluoropolymers
  • Frequency
  • High Temperature
  • Impedance
  • Low Temperature
  • Materials
  • Military Research
  • Polymers
  • United States Naval Academy

Fields of Study

  • Materials science

Readers

  • Electrical Engineering
  • Molecular Photonics/Laser Physics
  • Underwater engineering and Marine Technology.