Beta-HMX crystal form purity detection method based on X-ray powder diffraction technology

Abstract

The invention provides a beta-HMX crystal form purity detection method based on an X-ray powder diffraction technology. A beta-HMX crystal form purity quantitative correction model and a correspondingcrystal form purity test method are established by combining an X-ray powder diffraction technology with a chemometrics partial least square method. On the basis of a multivariate data analysis method, effective information can be extracted from crossed and overlapped spectrums, thereby realizing quantitative crystal form analysis without independent characteristic spectrum peaks. The beta-HMX crystal form purity can be accurately determined within 10 to 15 min and the sample dosage is smaller than 50 mg; no complex sample preparation is needed in the detection process and the operation becomes safe and rapid; and a problem that the purity of the crystal form of a trace amount of sample is difficult to detect in links of a synthetic sample lab test stage, product accident research factoranalysis and the like an be solved. Therefore, the reliable and efficient detection basis can be provided for quality control of beta-HMX products and crystal form stability research of a production process and a long-term storage process.

Description

technical field [0001] The invention belongs to the technical field of explosives, and in particular relates to a method for detecting the purity of β-HMX crystal form based on X-ray powder diffraction technology combined with chemometrics partial least squares method. Background technique [0002] Octometallic (HMX) is currently an explosive with high density, high energy, low sensitivity and excellent comprehensive performance among single explosives. It has been widely used as a model charge in the fields of high-energy mixed explosives, solid propellants and propellants. HMX has four crystal forms of α, β, γ, and δ, with 3,7-dinitro-1,3,5,7-tetraazabicyclo[3,3,1]nonane (DPT) as the intermediate There are two crystal forms of α-HMX and β-HMX in the synthesized HMX terminal product, among which β-HMX has low sensitivity and high energy, which is a practical crystal form with excellent performance, and α-HMX is an impurity crystal form. In order to control the quality of H...

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Problems solved by technology

[0005] The present invention proposes a β-HMX crystal form purity detection method based on X-ray powder diffraction technology to solve the technical problem of how to detect the crystal form purity of β-HMX containing α-HMX impurity crystal form

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