EFFECT OF SEVERAL GAS ATMOSPHERES ON HYDRAULIC FLUID SHEAR STABILITY

Abstract

The sonic-shear stability of polyisobutylene and polymethacrylate solutions in oil was examined under several gases and at pressures up to five atmospheres. Tests were conducted in a pressurized sonic treatment cup under nitrogen, hydrogen and helium atmospheres. Comparison tests under air were made at one atmosphere. Results indicated that sonic-shear stability varied inversely with gas solubility for all the gases, except air at one atmosphere. Both polymer solutions displayed highest viscosity losses under the helium atmosphere. The use of gases other than air and sonic test cell pressurization showed promise as a modification of the sonic-shear method, to make it more closely reflect mechanical-shear tests.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1967
Accession Number
AD0658057

Entities

People

  • Robert L. Lemar

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Air Pressure
  • Barometric Pressure
  • Classification
  • Contracts
  • Dissolved Gases
  • Engineering
  • Fluids
  • Free Radicals
  • Frequency
  • Hydraulic Fluids
  • Materials
  • Numbers
  • Polymers
  • Security
  • Shear Tests
  • Test Methods

Readers

  • Combustion and Flow Dynamics.
  • Internal Combustion Engine (ICE) Technology.
  • Polymer Science and Technology