Chemical Structural Aging Effects

Abstract

An investigation has been conducted into the chemical aging of ANB-3066 Minuteman propellant for the purpose of establishing means to employ accelerated surveillance data for predicting useful life under silo storage conditions (70 plus or minus 10F, inert atmosphere). At intervals during aging, chemical analyses (primarily infrared) were performed and physical tests were conducted, the latter consisting of gel content, degree of swell, creep compliance, dilatation, and crack propagation. The resulting data were analyzed and correlated to establish their utility for prediction of chemical aging - controlled service life. The observed hardening of ANB-3066 apparently is not caused by continued reaction between the rather large quantities of residual carboxyl and imine. Instead, it is probably the consequence of cross linking reactions involving AP oxidative attack upon polybutadiene backbone double bonds. Aging under 5% constant strain increases aging rates and reduces the predicted service life.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1974
Accession Number
ADA000538

Entities

People

  • George E. Myers

Organizations

  • Lockheed Propulsion Company

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Arrhenius Equation
  • Chemical Analysis
  • Chemical Reactions
  • Chemistry
  • Crack Propagation
  • Data Analysis
  • Data Science
  • Equations
  • Failure Mode And Effect Analysis
  • Heat Of Activation
  • High Temperature
  • Information Science
  • Mechanical Properties
  • Physical Properties
  • Regression Analysis
  • Stresses
  • Tensile Properties

Readers

  • Materials Science (Mechanical Engineering).
  • Polymer Science and Engineering.