Accelerated aging of AP/HTPB propellants and the influence of various environmental aging conditions
TNO Prins Maurits Laboratorium
Preliminary resuits on accelerated aging of lab-scale produced AP/HTPB propellant and propellants from dissectioned rocket motors are discussed, including aging logic, storage conditions, test techniques and resuits on mechanical, ballistic and safety testing. The mam aging effect observed was hardening of the propellant with time. The aging rate was found to be strongly dependent on the used storage conditions. Plasticizer depletion is identified as the main aging mechanism for the propellafits when stored under atmospheric condftions. The aging behaviour could well be described by the commonly used Layton’s model. Plasticizer from the propellant was found in the seals of test equipment, indicating a potential lifetime problem for rocket motors due to a possible interaction with rubbery motor components.
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Composite rocket propellants
International Symposium on Energetic Materials Technology, Phoenix, AZ, USA, 24-27 September 1995, 200-205