Accession Number:

ADA000538

Title:

Chemical Structural Aging Effects

Descriptive Note:

Final rept. Jun 1971-Jun 1974

Corporate Author:

LOCKHEED PROPULSION CO REDLANDS CA

Personal Author(s):

Report Date:

1974-10-01

Pagination or Media Count:

83.0

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.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE