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A method for detecting thermal stability of polymer bonded explosives

A technology for bonding explosives and thermal stability, which is applied in the preparation of test samples, measuring devices, instruments, etc., and can solve problems such as inapplicability of detection methods.

Active Publication Date: 2020-10-23
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thermophysical parameters measured by the thermal constant analysis method, thermogravimetric and simultaneous thermal analysis method, differential scanning thermal analysis method, and thermal conductivity method are mainly affected by the main phase (explosive crystal) in PBX, within a certain temperature range The changes are relatively small, and it is not easy to directly give a small amount of influence on the thermal stability of the PBX microstructure; since PBX explosives are brittle materials (the tensile fracture strength is within a few MPa), detection methods based on changes in mechanical constants such as DMA and TMA are also ineffective. Be applicable

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  • A method for detecting thermal stability of polymer bonded explosives
  • A method for detecting thermal stability of polymer bonded explosives
  • A method for detecting thermal stability of polymer bonded explosives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Detection of thermal stability of sample PBX1 microstructure

[0032] Select the molded PBX1 explosive to prepare a sheet-like PBX sample with a thickness of 1mm and a diameter of ф=10mm; figure 1 shown; then under the layout condition that the sample and the detector are 5.2 meters apart (the corresponding scattering vector q range is 0.08nm -1 ~0.8nm -1 ), carry out in situ variable temperature neutron small angle scattering experiments, raise the temperature from 303K to 433K at a heating rate of 1K / min, keep at 433K for 5min, and then cool down to 303K at a cooling rate of 1K / min, collect and record the temperature and detection of the sample The change of all scattered neutron counts on the detector with time; the change of all scattered neutron counts with time is converted into the change curve of scattered neutron count rate with time according to the time interval of 60s, such as figure 2 As shown; the change curve of the scattered neutron count ra...

Embodiment 2

[0033] Example 2 Detection of sample PBX2 microstructure thermal stability

[0034] Select the molded PBX2 explosives to prepare a sheet-like PBX sample with a thickness of 3mm and a diameter of ф=10mm; then place the sheet-like PBX sample at the neutron small scattering spectrometer sample with an in-situ temperature-changing device at the Mianyang Research Reactor; 0.08nm -1 ~0.8nm-1 Carry out in-situ variable temperature neutron small angle scattering experiments within the range of the scattering vector q, heat up from 293K to 393K at a heating rate of 1K / min, keep at 393K for 5min, and then cool down to 293K at a cooling rate of 1K / min, collect and record samples Changes with time of all scattered neutron counts on the temperature and detector; said all scattered neutron counts are converted into scattered neutron count rate change curves with time according to the time interval of 60s, such as Image 6 As shown; the change curve of the scattered neutron or X photon coun...

Embodiment 3

[0035] Example 3 Detection of thermal stability of sample PBX3 microstructure

[0036] Select shaped PBX3 explosives to prepare a sheet-like PBX sample with a thickness of 1mm and a diameter of ф=10mm; then place the sheet-like PBX sample at the neutron small scattering spectrometer sample with an in-situ temperature-changing device at the Mianyang Research Reactor; then at 0.08 nm -1 ~0.8nm -1 Carry out in situ variable temperature neutron small angle scattering experiments within the range of the scattering vector q, heat up from 293K to 393K at a heating rate of 1K / min, keep at 393K for 5min, then cool down to 293K at a heating rate of 1K / min, collect and record samples Changes with time of all scattered neutron counts on the temperature at the detector and on the detector; said all scattered neutron counts are converted into scattered neutron or X photon count rate change curves with time according to the time interval of 60s, such as Figure 8 As shown; the change curve...

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Abstract

The invention discloses a method for detecting the thermal stability of polymer-bonded explosive. The method is characterized in that the thermal stability of micro-structures of the polymer-bonded explosive can be detected. The method includes steps of preparing platy PBX (polymer-bonded explosive) samples from the formed PBX; carrying out in-situ variable-temperature neutron or X-photon small-angle scattering experiments in appropriate q ranges to acquire temperature-dependent variation curves of scattered neutron or X-photon counting rates; analyzing temperature-dependent relative and absolute variation of the scattered neutron or X-photon counting rates to judge the thermal stability characteristics of the micro-structures of the PBX. The method has the advantages that the influence offew relative integral micro-structures in the PBX on the thermal stability can be detected by the aid of the method, and the method is an effective method for detecting the thermal stability of micro-structures of complicated multi-component PBX materials; temperature-dependent variation, which is given by the aid of the method, of the scattered neutron or X-photon counting rates is an importantfoundation for intensive research on 'structure-function' relationships between the thermal stability and different types of macroscopic performance of the microscopic structures of the PBX.

Description

technical field [0001] The invention relates to a method for detecting the thermal stability of polymer bonded explosives, in particular to a method for detecting the thermal stability of the microstructure of polymer bonded explosives. Background technique [0002] Polymer Bonded Explosive (PBX explosive) is a highly filled composite material prepared by a series of complex processes from single explosive crystals, high polymer binders and several additives (the filling amount is usually at More than 90). Due to making full use of the detonation performance of explosive crystals and the mechanical properties of polymer materials, PBX explosives have excellent comprehensive performance in terms of safety performance, process performance, mechanical performance, machining performance and physical and chemical stability. It has a wide range of applications in the fields of weaponry and national economy. The prepared PBX explosives will be subjected to a series of temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/201G01N1/28
CPCG01N1/28G01N23/201
Inventor 白亮飞闫冠云田强孙光爱龚建刘渝庞蓓蓓陈良孙良卫彭梅
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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