Characterization of Amatex-20K
NAVAL WEAPONS CENTER CHINA LAKE CA
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Amatex 20-K is a modification of the proposed alternate fill Amatex- 20. The ammonium nitrate AN prills in Amatex-20 are replaced by prills of a solid solution of 10 potassium nitrate KN in AN. This substitution changes the temperature at which the large volume change transition of AN occurs from 32 C to 12-15 C, but does not completely eliminate the problem. The chemical and thermal stability of Amatex-20K has been given a first look survey via DTA TGA, DSC fast and slow cookoff, and isothermal decomposition techniques. With the exception of a less violent. reaction occurring at a lower temperature on fast cookoff, all of the tests suggest that the substitution of ANKN prills for the AN prills in the RDXTNT matrix is detrimental to the stability of Amatex. More work will be needed, particularly in the isothermal decomposition and slow cookoff areas, to make a sure judgment of the desirability of the substitution.
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