A rapid estimation method for the safety period of stacked double-base propellants

Abstract

The invention relates to a rapid prediction method for the stable stage of stacked biradical propellant powder. The rapid prediction method comprises the following steps: preparing a modeling sample of II-centralite available content near-infrared quantitative model of the biradical propellant powder by virtue of a thermal accelerated ageing method, and establishing the II-centralite available content near-infrared quantitative model by virtue of a near-infrared spectrum and chemometrics; establishing a stable stage prediction equation by virtue of a reliable temperature coefficient r0; and tracking the II-centralite available content in the thermal accelerated ageing process of the stacked biradical propellant powder by virtue of a near-infrared method, so as to obtain consumed critical time that the available content reaches critical criterion, and extrapolating the working condition and the stable stage of the stacked propellant powder under the storage environment temperature by virtue of the stable stage prediction equation. According to the rapid prediction method, the stable stage can be acquired only through the lossless tracking of the available contents of a sample at a temperature and different ageing time periods by virtue of the near-infrared method, the sample amount is reduced by 96%, and the method is safe and low in cost.

Description

technical field [0001] The invention belongs to the technical field of safety evaluation of explosives, and relates to a method for rapidly predicting the working conditions and stability period of explosives during storage. In particular, it uses near-infrared diffuse reflectance spectrometry to detect the effective content of No. Ⅱ medium fixed agent in the single-temperature heat-accelerated aging sample of accumulated double-base propellant (SF), and obtains the time consumed by the effective content of No. Ⅱ medium fixed agent to reach the critical criterion. A method for quickly estimating the safety period of double-base propellants under storage conditions and storage environment based on the safety period estimation equation. Background technique [0002] The chemical stability of explosives refers to the ability of explosives to maintain their chemical properties under working conditions and storage conditions without exceeding the allowable range so as to cause sa...

AI Technical Summary

Problems solved by technology

[0005] Double-based propellants adopt thermal accelerated aging test to track the effective content of No. Ⅱ stabilizer to obtain the stable period, and commonly used chemical titration (chemical method in which bromine reacts with stabilizer to form bromide) or high performance liquid chromatography to determine No. Ⅱ The effective content of the neutralizing agent is extracted by refluxing ether for 24 hours or even longer. The effective content of the pulverized sample No. Ⅱ is the effective content of the neutralizing agent. The low boiling point solvent ether is flammable and explosive, and the ether is prepared by mechanically pulverizing the aging sample of the double-base propellant. The safety of extracting the sample is poor, the operation is cumbersome and time-consuming, and the bromide produced by the chemical titration method will cause pollution

The change law of the effective content of the aging sample No. Ⅱ medium stabilizer obtained by the thermal accelerated aging test at different temperatures, when the stable period is obtained by the Arrhenius equation, since the thermal accelerated aging test uses at least 4 temperature points (65°C , 75°C, 85°C, 95°C), the number of sampling at each temperature point is at least 6 times, the amount of aging samples required is large, the test duration is more than 6 months, it is extremely time-consuming, and there is a risk of accelerated aging at high temperature for a long time High, it is difficult to meet the requirements of chemical stability design and evaluation in new formula development and process

[0006] For the double-base propellant with a certain size in the working condition and storage process, when the stability period is estimated, heat accumulation will occur during the heating process through the thermally accelerated aging test. On the one hand, it will lead to uneven distribution of the temperature field and uneven distribution of the stabilizer content. On the other hand, the multi-temperature point aging test of double-base propellants is very prone to combustion and explosion accidents due to heat accumulation. It is difficult to meet the needs of chemical stability evaluation in the storage process of double-base propellants by obtaining the stable period of stabilizer content determination

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