High-thermal stability PBX explosive and preparation method thereof

A technology of stability and explosives, applied in explosives processing equipment, explosives, nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., can solve problems such as exposure, poor coating effect, and depression, and achieve high safety sexual effect

Inactive Publication Date: 2019-06-04
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Li Rui (CN 103193561A) prepared a high-energy insensitive mixed explosive by mixing graphene oxide (GO) with a sensitive explosive through a solvent-non-solvent method. The test results showed that the impact sensitivity of the explosive was 10% to 70%. The sensitivity is 32%-40%, but the activation energy of HMX is only increased by 0.7%, and the thermal stability is not high
Jia Xinlei (Preparation and characterization of HMX / TATB polymer bonded explosives with different ratios, Journal of North University of China, 2017) used 5% Viton A as the binder, mixed 45% TATB and 50% HMX to prepare the PBX explosives The activation energy is 12.5% ​​higher than that of HMX, and the thermal stability is significantly improved. However, the surface morphology of the PBX explosive has obvious defects such as cracks, depressions, and exposure, and the coating effect is not good.

Method used

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  • High-thermal stability PBX explosive and preparation method thereof
  • High-thermal stability PBX explosive and preparation method thereof
  • High-thermal stability PBX explosive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve 0.2 g of HyTemp 4454 and 0.2 g of DOS in 1.6 g of analytically pure ethyl acetate for use.

[0031] (2) Disperse 1 g of TATB in 3 g of analytically pure petroleum ether by ultrasonic vibration for 1 hour and set aside.

[0032] (3) Add the bonding system solution containing HyTemp 4454 and DOS to 8.6 g of HMX explosives, stir while adding, and wait until the ethyl acetate evaporates completely to obtain the HMX / bonding system.

[0033] (4) Add TATB suspension to the HMX / adhesive system, stir for 1.5 hours, wait for the solvent to volatilize so that the whole material forms a paste, pass through a 30-mesh sieve to form 0.5mm ~ 1.0mm particles, and put it in a water bath oven at 70°C After drying for 1.5 hours, PBX explosives were obtained.

[0034] The DSC curves of HMX explosives measured at different heating rates are as follows: figure 1 Shown, the DSC curve that the high thermal stability PBX explosive that present embodiment obtains is measured under ...

Embodiment 2

[0036] This example is carried out with reference to the following mass composition: 8.6g HMX, 1g TATB, 0.1g HyTemp 4454 and 0.3g DOP. This embodiment is implemented with reference to Embodiment 1.

Embodiment 3

[0038] This example is carried out with reference to the following mass composition: 8.6g HMX, 1g TATB, 0.1g HyTemp 4454 and 0.3g DOS. This embodiment is implemented with reference to Embodiment 1.

[0039] The performance data of HMX explosive and above-mentioned embodiment 1~3 are as shown in table 1:

[0040] The performance data of table 1 HMX explosive and embodiment 1~3

[0041]

[0042] By comparing impact sensitivity, ultimate load and activation energy (E a) value, it can be drawn that the mechanical sensitivity of the PBX explosive prepared by the present invention decreases, and the activation energy improves, that is, the thermal stability is improved.

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Abstract

The invention provides a high-thermal stability PBX explosive and a preparation method thereof. The explosive comprises, by mass, 84-88% of cyclotetramethylenetetranitramine, 8-12% of triaminotrinitrobenzene and 2-6% of a bonding system; and a binder in the bonding system is polyacrylate rubber HyTemp 4454, and a plasticizer in the bonding system is dioctyl sebacate or dioctyl phthalate. The preparation method comprises the following steps: dissolving the bonding system by analytically pure ethyl acetate through adopting a solvent volatilization process, carrying out vibrating dispersion on TATB in analytically pure petroleum ether, and pouring the obtained bonding system solution into an HMX explosive while stirring until the solvent is completely volatilized; and adding the obtained TATBsuspension, performing stirring for 1-2 h until the solvent volatilizes to form a paste, sieving the paste to form 0.5-1.0 mm particles, and drying the particles to obtain the PBX explosive. The PBXexplosive prepared in the invention has the advantages of high energy, low mechanical sensitivity and good thermal stability.

Description

technical field [0001] The invention relates to a high thermal stability PBX explosive and a preparation method thereof, belonging to the field of energetic materials. Background technique [0002] Polymer bonded explosive (PBX) is a high-energy mixed explosive with simple explosive as the main component and one or several polymers as additives. Due to its high detonation energy, excellent mechanical strength and good environmental adaptability, PBX explosives have been highly valued by researchers in related fields since they were developed in the 1960s and 1970s. The additives in PBX explosives can interact with explosive molecules through polymer hydrogen bonds, and coat, bond and passivate the high-sensitivity main explosives to improve mechanical properties and reduce sensitivity. Among many additives, binders usually account for the highest proportion of additives, and often have multiple functions such as passivation, bonding, and plasticization, and have attracted w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/38C06B25/34C06B21/00
Inventor 韩志伟胡珊王伯良
Owner NANJING UNIV OF SCI & TECH
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