Thermal decomposition of triethylenediammoniumdiperchlorate

Studies on energetic compounds. Part 8 : Thermolysis of salts of HNO3 and HClO4

Abstract: The thermolysis of various substituted ammonium salts of nitric and perchloric acids has been reviewed in the present communication The mechanistic aspects of thermal decomposition of these salts have been discussed critically It has been observed that the proton transfer process do play a major role during thermolysis of these salts The plausible decomposition pathways have also been described

Preparation, crystal structure, and thermolysis of phenylenediammonium diperchlorate salts.

Abstract: Three salts of phenylenediammonium diperchlorate have been prepared and characterized by X-ray crystallography. Their thermal decomposition has been studied by thermogravimetry (TG), differential thermal analysis (DTA), and explosion delay (DE) measurements. The kinetics of thermal decomposition was evaluated by model fitting and isoconversional methods using TG data. The oxidation-reduction reactions near the surface of thermolysing perchlorates may be responsible for the decomposition followed by explosion. The possible pathways of thermolysis have also been proposed.

Review of thermal decomposition, kinetics parameters and evolved gases during pyrolysis of energetic materials using different techniques

Abstract: Thermal decomposition, kinetics parameters, and evolved gases during pyrolysis of energetic materials using different techniques have been widely studied experimentally and theoretically since a long time ago and up to now. The overall reaction processes and the conditions at which can be achieved and the quality and quantity of evolved gases obtained during their thermal decomposition still need more concern and investigation. The thermal analysis techniques such as (TG), (DSC), (DTA), FTIR, MS, or different combinations of them as a couple (TG-FTIR), (TG-MS) or triple (TG-MS-FTIR) are considered effective techniques for studying the thermal degradation of these materials. They allow a better understanding of the different pathways of chemical reactions and control the thermal behavior of these materials. The various kinetic models used to determine the kinetic parameters and the produced data from the measuring techniques also create deviations between the values of kinetic parameters for the same material used. Energetic materials of various classes and characterizations are introduced in this review and the values of kinetic parameters and gas product types are presented in tabulated forms and discussed. A comparison between the kinetic parameters value and evolved gas types for the same and different materials is presented in tabulated form and discussed.

Thermal behaviour of morpholinium perchlorate

Abstract: Morpholine is a base of moderate strength, comparable with that of ammonia, and capable of forming -onium-type salts. Extensive studies [1,2] have been made on the thermal stability of ammonium perchlorate because of its technological use as an oxidant in solid state rocket propellants. The preparation, characterization and thermal behaviour of morpholinium perchlorate are reported in this note. The study was followed by XRD, IR, TG, DTA and mass spectral techniques.

Thermal behaviour of ethylenediammonium perchlorate

Abstract: Perchlorates are powerful oxidizing agents [1] and are used as oxidants in explosives, pyrotechnics and solid state rocket propellants. Extensive studies have been made on the thermal stability of ammonium and related perchlorates due to their technological importance as oxidants [2,3]. This note reports the preparation, characterization and thermal behaviour of ethylenediammonium perchlorate. The study has been followed by XRD, IR, TG, DTA and MS techniques.

Thermal Decomposition of Tetraethylammonium Perchlorate

Abstract: Thermal decomposition of tetraethylammonium perchlorate has been studied by thermogravimetry, differential thermal analysis and mass spectrometry. The title compound undergoes crystallographic transformation at 98°C and explodes at 298°C. The heat of phase transformation is calculated to be 2.5 kcal/mol. The mass spectral data suggest that the salt undergoes thermal decomposition into neutral particles which are then vapourized and ionized as well as oxidized.