Explosive thermal stability grading method based on differential scanning calorimetry

Abstract

The invention discloses an explosive thermal stability grading method based on differential scanning calorimetry. According to the method, thermal decomposition reaction kinetic parameters are obtained according to the thermal decomposition characteristic quantity of materials in explosive manufacturing process, then the process temperature Tp needed by the maximum reaction rate arrival time TMRadunder the heat insulation conditions of different danger levels is obtained, and the process temperature Tp of different danger levels and the specific operation time delta are used as scales; and comparing and measuring of the actual process temperature Tps and the actual process operation time ts of the materials in the process are carried out, quantitatively obtaining of a temperature correction coefficient gamma 1 of the thermal stability of the materials is realized, and quantitative grading evaluation is carried out by taking the temperature correction coefficient gamma 1 as the thermalstability level of the materials in the process.

Description

technical field [0001] The invention belongs to the technical field of explosives, and mainly relates to a process temperature T p A new method for thermal stability testing and grading evaluation of materials in the propellant and explosive manufacturing process with the specific operation time coefficient δ as the scale, especially related to the thermal stability grading method of propellant and explosive based on differential scanning calorimetry. Background technique [0002] As an energetic material, pyrotechnics are prone to combustion and explosion under thermal, static, mechanical and other stimuli. Carrying out the combustion and explosion risk assessment of pyrotechnics manufacturing process is an important content of safety production design and control. The materials in the explosives manufacturing process are poor conductors of heat and are extremely sensitive to thermal stimuli. When heated, they will undergo self-catalytic decomposition and exothermic reactio...

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Problems solved by technology

[0018] It can be seen from Table 1 that the determination method of the temperature correction coefficient γ1 is a semi-quantitative method, although there are corresponding evaluation parameters , but the actual operability is poor, and the values ​​cannot be accurately quantified one by one, and the connotation of the concept of value conditions is not clear, lack of quantitative criteria, and it is difficult to effectively combine with actual process conditions to evaluate the hazard degree of process materials

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