Measurement of Viscosity of Reacting Vinyl-Ester Resins Using Direct-Current Sensing

Abstract

This study investigated the sensing of viscosity an gelation of reacting vinyl-ester (VE) resins using direct-current (DC) sensing technology. The resin system studied was a tetrabutylammonium acetate (TA)-doped Dow Derakane 411-C-50 VE resin. A model of the resistance of a reacting polymer liquid as a function of the geometrical parameters of the DC-sensing system and the material properties of the resin system was developed. The model inputs were conduction path length (L), conductor surface area (A), resin viscosity (eta(t)), concentration of TA ions (Ci), charge of TA ions (Qi), and size of TA ions. Estimates, using the theoretically determined values for the model inputs, for the resistance of the DC sensing system employed in this investigation were the same order of magnitude as the experimentally determined values. The developed model of a reacting polymer liquid was furtber extended to the sensing of gelation and then successfully applied to the on-line sensing of viscosity.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2000
Accession Number
ADA373539

Entities

People

  • Bruce K. Fink
  • John W. Gillespie Jr.
  • Kenric M. England

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Composite Materials
  • Direct Current
  • Electric Fields
  • Equations
  • Free Radicals
  • Gelation
  • Materials
  • Measurement
  • Military Research
  • Resin Transfer Molding
  • Resins
  • Resistance
  • Styrene Plastics
  • Surface Warfare
  • Viscosity
  • Warfare

Fields of Study

  • Materials science

Readers

  • Electrical Engineering
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Polymer Science and Engineering.