Method for rapidly predicting ultimate stage of packing single-base propellant

Abstract

A method for rapidly predicting the ultimate stage of a packing single-base propellant includes the steps of preparing a single-base propellant diphenylamine effective content near infrared quantitative model modeling sample through a heat accelerated ageing method, collecting a near infrared spectrum, establishing a diphenylamine effective content near infrared quantitative model through a chemical metrology, establishing an ultimate stage predicting equation through a reliable temperature coefficient r0, tracking and detecting the diphenylamine effective content in the packing single-base propellant heat accelerated ageing method through a near infrared method, obtaining the critical time consumed when the effective content reaches the critical criterion, and extrapolating the packing propellant ultimate stage under the working conditions and the storage environment temperature through the ultimate stage predicting equation. By means of the method, the ultimate stage can be conveniently obtained only by nondestructively tracking the effective content of a propellant loading sample at different ageing moments at a temperature through the near infrared method, the sample amount is reduced by 96%, and safety and low cost are achieved.

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, a spectroscopic method is used to detect the effective content of the stabilizer of the single-base propellant single-temperature accelerated aging sample, obtain the time taken for the effective content of the stabilizer to reach the critical criterion, and extrapolate the stability period under the service environment temperature according to the stability period estimation equation , a method for quickly estimating the stability period of single-base propellants (DF) under working conditions and storage environments. Background technique [0002] The chemical stability of explosives refers to the ability of explosives to maintain their chemical properties within the allowable range under working conditions and storage conditions, so as ...

AI Technical Summary

Problems solved by technology

[0004] In the past, the thermally accelerated aging method was used to track the effective content of the stabilizer to estimate the stability period of the single-base propellant, and the chemical method (chemical titration method for short) to determine the effective content of the stabilizer was commonly used. It takes several hours or even longer to extract the effective content of the stabilizer through saponification, distillation, and removal of ether. The operation is cumbersome and time-consuming, and the bromide produced by chemical titration will cause pollution; through the single-base emission at different temperatures obtained The change law of the effective content of the stabilizer in the aging sample of the medicinal material is estimated by the Arrhenius equation. Since the accelerated aging test uses at least 4 temperature points (65°C, 75°C, 85°C, 95°C), each The number of sampling times at each temperature point is at least 6 times, the amount of aging samples required is large, and the test duration is more than 6 months, which is extremely time-consuming, and it is dangerous to accelerate aging at high temperature for a long time and mechanically cut single-base propellant aging samples. High, it is difficult to meet the requirements of chemical stability design and evaluation in new formula development and process

[0005] When predicting the stable period of a single-base propellant with a certain accumulation size (accumulated single-base propellant) in the working condition and storage process, heat accumulation will occur during the heating process through the accelerated aging test. The distribution is uneven. On the other hand, the multi-temperature point aging test of accumulated propellants is very prone to combustion and explosion accidents due to heat accumulation. Determine the stability period of propellant content to meet the needs of safety evaluation during the accumulation of propellant powder and storage process

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