Sample loading device and method for evaluating thermal stability of energetic compound

A thermal stability and compound technology, which is applied in the direction of measuring devices, thermal analysis of materials, preparation of test samples, etc., can solve problems such as batch accuracy differences in test results, and achieve the effect of avoiding the introduction of air and simple operation steps

Active Publication Date: 2021-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, due to differences in sample mass for each measurement, there are significant variations in the batch accuracy of test results

Method used

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  • Sample loading device and method for evaluating thermal stability of energetic compound
  • Sample loading device and method for evaluating thermal stability of energetic compound
  • Sample loading device and method for evaluating thermal stability of energetic compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] combined with figure 1 , to introduce the device in detail.

[0028] A sample loading device for thermal stability evaluation of energetic compounds comprises an inert gas purging and displacing device 1, a glass sample bottle 2, a disposable bottle cap 7, and a bottle cap sealer 8.

[0029] The inert gas purge and displacer 1 is provided with an inlet vacuum valve on one side, an exhaust vacuum valve on the other side, a rubber stopper 3 on the top, and a vacuum gauge 4 in the rubber stopper.

[0030] A glass sample bottle 2 is placed in an inert gas purging and displacing device 1 for containing energetic compounds;

[0031] The disposable bottle cap 7 is sealed by the bottle cap sealer 8 after the energetic compound is loaded into the glass sample bottle.

[0032] When the device is working, connect the exhaust vacuum valve of the inert gas purge and displacer 1 to the mechanical pump, and connect the intake vacuum valve to the high-purity argon pipeline. And set ...

Embodiment 2

[0037] Adopt sample loading device and method provided by the present invention to take by weighing 2.706, 0.688 and 1.656 grams of dinitramide ammonium propellant solutions of three kinds of different qualities respectively, apply TAM III thermal activity microcalorimeter to carry out propellant thermal stability evaluation, evaluate The results are shown in Table 1. The cumulative heat flow values ​​(Max. heat flow within time of evolution) are 94.23, 96.19 and 95.50 μW / g respectively, which eliminates the differences in the heat flow measurement values ​​caused by the different air contents in the measurement bottles of different samples. difference.

[0038] Table 1 The thermal stability evaluation results of ammonium dinitromide (ADN) propellant solutions with different qualities.

[0039]

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Abstract

The invention discloses a sample loading device for evaluating thermal stability of an energetic compound. The sample loading device comprises an inert gas purging and displacer, a glass sample bottle, a disposable bottle cap and a bottle cap sealer. An air inlet vacuum valve is arranged on one side of the inert gas purging and displacer, an air exhaust vacuum valve is arranged on the other side of the inert gas purging and displacer, a rubber plug is arranged at the top of the inert gas purging and displacer, and a vacuum meter is placed in the rubber plug. The glass sample bottle is arranged in the inert gas purging and displacer, and the glass sample bottle is sealed by the bottle cap sealer after the energetic compound is filled in the disposable bottle cap. The invention further discloses a sample loading method of the energetic compound. The sample loading device and method for evaluating the thermal stability of the energetic compound are simple to use, can prevent the energetic compound from interacting with oxygen in the air to release heat and even explode in the thermal stability evaluation process, and improve the accuracy and repeatability of measurement.

Description

technical field [0001] The invention belongs to the technical field of thermal stability evaluation of energetic compounds, and specifically relates to a sample loading device and method for thermal stability evaluation of energetic compounds. The device and method can realize the complete isolation of energetic compounds from air and avoid O in the air in the performance evaluation 2 、H 2 O and CO 2 Interactions between gases and energetic compounds. Background technique [0002] Energetic compounds are widely used in the fields of aerospace vehicle propulsion, weapons, explosives, etc. Due to their high energy density, they are prone to explosion, so it is very important to determine their storage stability at room temperature. In order to accelerate the evaluation of stability, it is usually necessary to weigh a certain amount of energetic compound, store it in a sealed glass sample bottle, put it into a high-sensitivity heat flow calorimeter, and test it under high te...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N25/00G01N1/36
CPCG01N25/00G01N1/36
Inventor李林王晓东张万生丛伟民马智勇邓显洲潘晓丽卢婷
OwnerDALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI