Preliminary Study On Thermal Stability Of Two Energetic Materials

In view of the current situation of civil explosives applied to high-temperature blasting in open-air deep-hole coal fire area,the simulated high-temperature blasthole heating technology was studied at the laboratory scale.This experimental technique was used to analyze the thermal decomposition of ammonium fry by two typical additives.The impact of the characteristics.The results show that the peak temperature of the decomposition reaction of ammonium nitrate added by 5%NH₄Cl is reduced by24.8 ^oC,and the time for the sample to reach a constant oven temperature is shortened.The addition of NH₄Cl significantly reduces the heat resistance of the ammonium explosive;Adding 5%Na₂SO₄ to the fried medicine prolongs the time when the sample reaches a constant oven temperature and improves the temperature resistance of the ammonium explosive.The results of this paper provide a basis for the design of heat-resistant civil explosives.Azo-peroxyesters are multifunctional energetic compounds,which can reverse the configuration of polymer monomers and are widely used in organic drug synthesis.Many azo esters are directly involved in chemical reactions with low yields of target products,but if azo esters are dissolved in appropriate solvents,the yields of target products will be greatly increased.Aiming at the thermal stability of diethyl azodicarbonate?DEAD?dissolved in different solvents,this paper improves the safety mosaic of DEAD in industrial application from microcosmic aspect by means of differential scanning calorimeter?DSC?and constant temperature calorimeter?TAM III?.The dynamic parameters measured by thermal analysis experiments,such as the initial temperature of exothermic reaction,the time required to reach the maximum reaction rate,reaction enthalpy,peak energy and activation energy,can be used to characterize the factors affecting the chemical reaction mechanism.In order to better understand the thermal decomposition characteristics and potential thermal hazards of DEAD in different solvents,Kissinger,Arrhenius and Semenov theory were used to study the thermal kinetics of DEAD.The conclusions obtained will serve as the basic reference for DEAD to be used in industrial production safety.The results of comprehensive thermal decomposition experiments and thermodynamic simulation software analysis lead to the following conclusions:?1?From the experimental results of DSC and TAM III,the ionic liquid[Bmim]BF₄,[Bmim]NTf₂ makes the DEAD safer and more efficient than the three conventional solvents such as methanol,ethyl acetate and acetonitrile.The initiation of polymerization of organic polymeric materials.?2?Ion species are the key factors affecting T₀ and?H_d under dynamic conditions.Obviously,symmetrical shapes,such as BF₄ and PF₆,have special effects.?H_d decreases with different additives,which in turn affects ?H_d.