Propellant intrinsic stability

Composite propellants consist of an oxidizer (AP/AN/ADN), a metallic fuel such as Al, Mg etc and a binder, usually a polymer which also serves as a fuel. Vacuum stability tests (VSTs) suggest that composite propellants are intrinsically more stable than SB, DB and propellants. However, use of more exotic ingredients such as oxidizers (ADN and hydrazinium nitroformate, HNF), binders [poly([NiMMO)] and poly([GlyN)] are likely to introduce severe compatibility-related problems [30, 31]. Some recent research in this direction indicates that stability of such propellants is largely determined by the chemical and mechanical properties of propellants. However, early evidence of deterioration generally comes from a change in their mechanical properties rather than from chemical investigations [32]. 

A-tract DNA duplexes exhibit high propeller twist and rigidity, which makes A-tract DNA unfavourable for triplex formation. It has been demonstrated that the introduction of a single central GC pair into the duplex significantly enhances the stability of the resulting triplex, as does the introduction of dia-minopurine. In both cases, the stabilisation occurs due to the disruption of the intrinsic properties of A-tract DNA. 

Apart from the question of linear stability of a coupled burning propellant-gas chamber system, there is the question of linear or intrinsic stability of a burning propellant as an isolated system in a constant pressure environment. The mathematical model presented above exhibits solutions that are intrinsically... 

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