Method for characterizing quality of NTO crystals in press-fitting PBX explosive column

Abstract

The invention discloses a method for characterizing the quality of NTO crystals in a press-fitting PBX explosive column. The method includes: sealing the NTO-based PBX explosive column in an aluminum-plastic bag, keeping the temperature at 60 DEG C for 2 hours, keeping the temperature at 5 DEG C for 2 hours, repeatedly operating for 3-5 times, standing at room temperature for 24 hours, and takingout the explosive column. performing axial shallow cutting on the explosive column to split the explosive column, carefully taking out at least 100 NTO particles on a natural section at multiple points, randomly selecting 10 NTO particles, respectively measuring the half-peak width of a characteristic peak at 1104 cm -1 by using a microscopic Raman spectroscopy, calculating a relative experimentalstandard deviation RSD, and comparing with the NTO crystal quality before coating to determine whether the NTO crystal quality is deteriorated or not. According to the method, the NTO crystal qualityin the NTO modeling powder pressed explosive column prepared through the supercritical method is represented, and the qualified PBX explosive column can be guided to be pressed.

Description

Technical field [0001] The invention belongs to the field of testing and research on the physical and chemical properties of propellant samples, and mainly relates to the characterization and research of the quality of the NTO crystals in the press-packed PBX explosive column, and characterizes whether the quality of the NTO crystals is deteriorated after the PBX explosive column is pressed by the modeling powder prepared by the supercritical insulation method. Background technique [0002] The NTO (chemical name 3-nitro-1,2,4-triazol-5-one) described in the present invention is a high-energy, low-sensitivity elementary explosive with excellent comprehensive performance, white or light yellow crystals Granules, good thermal stability, melting point ≥260℃ (decomposition), DSC decomposition peak temperature ≥270℃, with certain acidity (pKa=3.67). The crude NTO is prepared by nitrating 1,2,4-triazol-5-one (TO), and then recrystallized to improve the purity and crystal form before it...

AI Technical Summary

Problems solved by technology

[0032](1) The NTO crystal in the PBX press-packed charge is embedded in the binder network, and it is very easy to artificially damage the NTO crystal when it is taken out from the PBX explosive by external force , causing new defects;

[0033] (2) The mechanical strength of PBX is defective, because there is no characterization method for the quality of NTO crystals in the grain, so it is impossible to accurately judge whether the mechanical strength defect is caused by the broken NTO crystals;

[0034] (3) Since there is no method for accurately characterizing the NTO crystals in the press-packed grain, it is not conducive to accurately adjust the supercritical conditions for the manufacture of molding powder or the conditions for pressing the grain

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