Applicability of Non-isothermal DSC and Ozawa Method for Studying Kinetics of Double Base Propellant Decomposition

摘要: In order to determine Arrhenius kinetic constants various experimental techniques and testing conditions have been used. Also, approaches data treatment procedures applied, resulting sometimes in considerable disagreement the values of parameters reported literature. The non-isothermal differential scanning calorimetry (DSC) measurements isoconversional Ozawa method are very often used study kinetics energetic materials. However, some cases is uncritically, i.e. not taking into account limitations possible dependence on conditions. our previous studies double base single propellants we shown that (sample mass, heating rate, type sample pan, etc.) may considerably affect results. An unusual behaviour manifests existence a discontinuity slope change plot has observed case propellants. We explained such by self-heating effects. this paper studied decomposition from DSC experiments using unhermetically closed pans, effect nitroglycerine evaporation Kinetics isothermal thermogravimetry. It numerical simulation at slower rates smaller mass completely evaporate before peak maximum, higher activation energy (173 kJ/mol). At faster larger masses certain amount still exists propellant maximum temperature, lower (142 point connected with presence temperature. This implies obtained small samples slow kJ/mol) corresponds nitrocellulose