Electrical D. C. Conductivity of Pitch.

Abstract

Untreated A240 pitch was thermally cycled to 450 C at rates of 5 C/min, 1 C/min, and 5 C/hr. The electric (d.c.) conductivity measured during both heating and cooling portions of the cycle displayed a hysteresis effect resulting from volatilization of lower molecular weight components, polymerization, and mesophase formation. The heating curve obeyed an Arrhenius relation at low temperatures below the onset of significant volatilization, while the cooling curve was observed to follow an Arrhenius relation at all temperatures. Keywords: Pitch, Electrical conductivity, Mesophase, Activation energy, and Rheology.

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Document Details

Document Type
Technical Report
Publication Date
Oct 30, 1987
Accession Number
ADA191266

Entities

People

  • Phillip I. Gold

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Classification
  • Conductivity
  • Electrical Conductivity
  • Energy
  • Heat Of Activation
  • High Pressure
  • Hysteresis
  • Low Temperature
  • Materials
  • Materials Science
  • Measurement
  • Molecular Weight
  • Polymerization
  • Security
  • Viscometers
  • Viscosity

Readers

  • Fluid Dynamics.
  • Organic Chemistry
  • Thermal Physics or Thermal Science.