Iranian Scientific Association of Energetic Materials

Chemical stability in propellants is important issue. In this article chemical and thermal stability for two kinds of double and single base propellants are investigated. In mass loss test in 90 ⁰C, after 18 days mass loss for both samples is no more than 3%. By stabilizer measurement it was evident that remaining stabilizer content in aged samples are more than 10% in relative to fresh samples. Also kinetic calculation results from Differential Scanning Calorimetry (DSC) Shown no obvious changes for heat of reaction and kinetic parameters. In vacuum stability test, All samples except double base propellant which was aged in 90 °C released less gas volume in relative to standard. Also released gas from this sample are identified by ion mobile spectrometry it was evident that main composition of released gas is nitrogen oxides. Releasing NOX gases indicated that this sample is in autocatalytic State.