Method of estimating safety storage life of pile-stored single-base propellant

Abstract

The invention relates to a method of estimating safety storage life of a pile-stored single-base propellant. The method is characterized by using a thermally accelerated aging process to prepare an effective stabilizer content near-infrared quantitative modeling sample, and using a near-infrared diffuse reflection spectrograph to collect a spectrum and construct an effective stabilizer content near-infrared quantitative model; carrying out single-temperature accelerated aging test, using a near-infrared process to track and detect effective stabilizer content of the piled propellant during aging, and extrapolating safety storage life at storage environment temperature according to an estimation equation. The method is quick, safe and nondestructive and is simple to perform, near-infrared quantitative modeling samples with different effective stabilizer contents are acquired by controlling sampling time, and the defect that low-content samples are non-uniformly distributed due to manufacture techniques is overcome. The need for a dangerous operation process of mechanical sample crushing in stabilizer extraction in a chemical titration method is also avoided, intrinsic safety is achieved, and the cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of safety evaluation of explosives and relates to a method for predicting the safe storage life of explosives during storage. In particular, it uses near-infrared spectroscopy to detect the effective stabilizer content of single-base propellant single-temperature heat-accelerated aging samples accumulated and stored, and obtains the time it takes for the effective stabilizer content to reach the critical criterion, and extrapolates the service life according to the safe storage life prediction equation Safe storage life at ambient temperature, a method for estimating the safe storage life of single-base propellants (DF) in a stacked storage environment. Background technique [0002] The safe storage life of propellants and explosives is the storage time before propellants and explosives undergo accelerated catalytic decomposition under storage conditions. [0003] Nitrocellulose is the energy component in s...

AI Technical Summary

Problems solved by technology

[0004] In the past, the thermally accelerated aging method was used to track the effective stabilizer content (GJB770B-2005 method 506.1 estimated storage life thermally accelerated aging method) to estimate the safe storage life of single-base propellants, and the chemical method of bromine reacting with stabilizer to form bromide (referred to as Chemical titration method) to measure effective stabilizer content, this method adopts diethyl ether reflux to extract effective diphenylamine, and extraction operation needs 24 hours even longer time is long, and low boiling point solvent diethyl ether is flammable and explosive, and safety is poor, and operation is loaded down with trivial details, time-consuming And the bromide produced by chemical titration brings pollution;

[0005] According to the change law of the effective stabilizer content of aging samples of single-base propellant materials obtained at different temperatures, when predicting the safe storage life with the Berthelot equation, at least four temperature points (65°C) are used in the accelerated aging test. , 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, and the test duration is more than 6 months, which is extremely time-consuming, and the long-term high-temperature accelerated aging and mechanical Cutting aging samples of single-base propellants to prepare samples for extraction is very risky;

[0006] For a single-base propellant with a certain stack size (pile-up propellant), heat accumulation will occur during the heat-accelerated aging test. The temperature point aging test is very prone to combustion and explosion accidents due to heat accumulation, so it is difficult to pass the multi-temperature point heat-accelerated aging test and use the chemical titration method to obtain the stabilizer content to determine the safe storage life. Heat accumulation and post-combustion explosion accidents make it difficult to meet the requirements of chemical safety design in the development of new formulas and estimation of safe storage life during storage, and new methods are needed

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