Accession Number:

ADP004455

Title:

Stability and Compatibility Testing Using a Microcalorimetric Method,

Descriptive Note:

Corporate Author:

AMERICAN DEFENSE PREPAREDNESS ASSOCIATION ARLINGTON VA

Report Date:

1982-06-02

Pagination or Media Count:

10.0

Abstract:

A microcalorimetric method is used for compatibility and stability studies. The high sensitivity of the instrument permits measurement at 60 C or even lower, i.e. under more realistic conditions than offered by conventional techniques like DTA and vacuum stability tests. The instrument consists of four independent calorimeters with a short thermal relaxation time, high sensitivity and excellent baseline stability. The calorimeters are placed in a common, precisely thermostated water bath. In compatibility studies, heat flow curves are recorded for the pure components and a mixture of these. A theoretical curve is constructed, which simulates a non interacting system. The difference between the theoretical and the experimental curve for the mixture reflects the degree of interaction between the materials. A number of compatibility problems are discussed, including interactions in mixtures of TNT with amineamide type polymers, polycarbonate - double base propellant interactions under various conditions and the influence of an anaerobic sealant on a high explosive and a propellant. Some results from stability measurements on an igniting compound are also presented.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE