Accession Number:

AD0743225

Title:

Chemical Structural Aging Effects.

Descriptive Note:

Special interim technical rept.,

Corporate Author:

THIOKOL CHEMICAL CORP BRIGHAM CITY UTAH WASATCH DIV

Personal Author(s):

• Layton,Lionel H.

Report Date:

1972-05-01

Pagination or Media Count:

32.0

Abstract:

During the past ten years of solid propellant development, the problem of predicting motor service life from propellant viscoelastic behavior and accelerated aging data has persisted. The basic theory for converting elevated temperature aging results to long term equivalent ambient aging predictions depends upon either a single chemical reaction or competing reactions having the same reaction rates and activation energies. Each chemical reaction occurring during cure and aging of the solid propellant contributes by either increasing or decreasing the tensile strength of the material. While it is not possible to control the chemical reactions in such a fashion that its contribution to the material mechanical properties can be determined, a procedure is presented to determine these individual reaction effects using a mathematical correlation of the chemical reaction rate and mechanical properties data. A sample computation is presented using limited data available. Author

Descriptors:

• *SOLID ROCKET PROPELLANTS
• AGING(MATERIALS)
• LIFE EXPECTANCY(SERVICE LIFE)
• ACCELERATED TESTING
• CHEMICAL REACTIONS
• TENSILE PROPERTIES
• SOLID ROCKET PROPELLANT BINDERS
• REACTION KINETICS
• CHEMICAL ANALYSIS

Subject Categories:

• Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE