Accession Number:

ADA002836

Title:

Chemical Structural Aging Effects.

Descriptive Note:

Final technical rept. Jun 71-Aug 74,

Corporate Author:

THIOKOL CORP BRIGHAM CITY UTAH WASATCH DIV

Personal Author(s):

Report Date:

1974-10-01

Pagination or Media Count:

185.0

Abstract:

An accelerated aging study performed with TP-H1011 propellant has been accomplished and an aging model suggested to describe the age effects on the chemical reactions and mechanical properties. A new and unique technique for separating the solids from the binder in cured propellant has been developed and is described. The crosslinking reaction of the epoxide from the curing agent and the carboxyl from the prepolymer is essentially complete at the end of the cure period. Evidence also shows that the aging reaction may well be the formation of crosslinks between polymer chains at sites of unsaturation. The change in binder gel content and the mechanical properties of the propellant follow an aging model equation that corrects for a perturbation in the aging chemical reaction during the early part of the aging period. A suggestion for the cause of the perturbation is given.

Subject Categories:

  • Physical Chemistry
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE