Evaluation of the Stability of Single-base Propellants in 10-year Storage Period by Microcalorimetry

Abstract

The invention discloses a novel method for evaluating stability of a one-base propellant within a 10-year storage period through microcalorimetry. The method is characterized in that the stability reaction kinetics is researched by tracking micro heat released or absorbed by the one-base propellant at every moment, a time-temperature equivalent relation of the storage process is established, the heat accumulation effect is researched according to a heat balance equation established through heat generation and heat conduction, thus, a heat explosion critical criterion is obtained, microcalorimetry evaluation rules, covering size effects, about storage safety of the one-base propellant are formed, the evaluation rules are compared according to heat response signals output according to a microcalorimetry test when storage safety is evaluated, and the evaluation result of the stability within the 10-year storage period is given. The stability of the one-base propellant within the 10-year storage period is evaluated through microcalorimetry, the stability within 10-year storage period can be given within 10 days, and the measurement process is rapid, safe, nondestructive, environmentally friendly and convenient.

Description

technical field [0001] The invention belongs to the technical field of safety assessment of single-base propellants, and relates to a method for evaluating the stability of single-base propellants during storage. In particular, it uses microcalorimetry to study the storage stability of single-base propellants, establishes evaluation criteria and test methods, and forms a new method for evaluating the storage stability of single-base propellants covering size effects and time scales. Background technique [0002] The ability of a single-base propellant to keep its physical and chemical properties from changing beyond the allowable range is called stability. Single-base propellant (NC as the main body) contains -C-ONO 2 or -C-NO 2 structure. The molecular structure shows that the C-N fracture, on the one hand, the heat released is the energy source for expansion and work, on the other hand, it is also the source of slow decomposition, resulting in heat accumulation, thermal...

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Problems solved by technology

[0014] The purpose of the present invention is to solve the problem that the existing qualitative stability evaluation method cannot give a clear stabilization time, the sample pretreatment process is cumbersome and dangerous, and the quantitative stability evaluation method is time-consuming, cumbersome and dangerous; Due to the inability to analyze the thermal stability of size charges, a new method for evaluating the storage stability of single-base propellants including size effects by microcalorimetry is provided. This method does not require complicated sample pretreatment processes, and can directly Perform stability analysis based on propellant material or size charge, which is safe, environmentally friendly and low in cost

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