Effect of sample mass on the kinetics of thermal decomposition of a solid: Part 1. Isothermal mass-loss process of molten NH 4NO 3

Abstract

The effect of sample mass on the kinetics of the isothermal mass-loss process of molten NH 4NO 3 was investigated by simultaneous TG-DSC. The conventional method of kinetic analysis derived for the thermal decomposition of a solid was adopted for calculating the kinetic parameters in order to evaluate the validity of the kinetic theory. The kinetic parameters obtained from these calculations were sample-mass dependent. A possible way of obtaining kinetic parameters that are independent of sample mass is discussed for the one-dimensional contracting model, i.e. the R 1 law.