2004•Journal of Propulsion TechnologyOpen access
Effect of phase separation on the properties of NEPE propellant
Xiao-Ping Zhang
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Abstract
The effect of phase separation on the properties of NEPE propellant was studied by low temperature storing and many test means. Phase separation takes place under -20℃ when the ratio of plasticizer and binder is less than 2.8 in NEPE propellant. The phase separation degree is increased with the low temperature stockpiling time increase. The phase separation results in the decrease of the low temperature mechanical properties and the increase of the fluctuation range of the maximum elongation. The impact sensitivity decreases significantly and the friction sensitivity increases appreciably. The burning rate increases 0.3mm/s～0.7mm/s. To stabilize the properties of NEPE propellant, it is necessary to control the phase separation of NEPE propellant.