Derivation of the self-accelerating decomposition temperature for self-reactive substances using isothermal calorimetry

Abstract

In order to determine the self-accelerating decomposition temperature (SADT) for self-reactive substances in packaging, it is proposed that chemical kinetic parameters are derived from the data obtained by an isothermal heat flux reaction calorimeter (C80D), after which the SADT is evaluated from theoretical equations based on the Semenov model. This method avoids the shortcomings of the US isothermal storage test and the Dewar vessel heat accumulation storage test. We have evaluated the SADTs for a dozen self-reactive substances. These SADTs coincide well with the US SADT test results and have an excellent correlation with the Dewar vessel test results. This proposed method gives more accurate results than the SADT-estimating method using data obtained by an accelerating rate calorimeter.