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Characterization of Interface Structure in Plastic Bonded Explosives Based on Gas Permeation Method

A technology of gas permeation and interface structure, which is applied in permeability/surface area analysis, material analysis, suspension and porous material analysis, etc. It can solve problems such as lack of technology, and achieve the effect of simple and easy characterization technology.

Active Publication Date: 2018-09-25
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, among the above characterization techniques, there is still a lack of techniques that can quantitatively describe the microstructure below 10nm; moreover, there is no characterization method specifically for the PBX interface structure

Method used

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  • Characterization of Interface Structure in Plastic Bonded Explosives Based on Gas Permeation Method
  • Characterization of Interface Structure in Plastic Bonded Explosives Based on Gas Permeation Method
  • Characterization of Interface Structure in Plastic Bonded Explosives Based on Gas Permeation Method

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Embodiment 1

[0035] Add 4g of F2311 rubber into 96g of ethyl acetate, and stir at 40°C for 10 hours to obtain an ethyl acetate solution with a content of 4wt% F2311. Add HMX with an average particle size of 1.36 μm into the ethyl acetate solution, stir for 10 minutes, and ultrasonically disperse for 30 minutes to obtain HMX suspensions with contents of 0, 0.04, 0.2, 0.32, and 0.4 wt%, respectively. The HMX suspensions with contents of 0, 0.04, 0.2, 0.32 and 0.4wt% were respectively coated on the surface of polyvinylidene fluoride (PVDF) porous ultrafiltration membrane by scraping method, and the wet coating thickness was 120 μm. The surface pore size of PVDF ultrafiltration membrane is 15nm. The solvent was evaporated at 30°C to prepare a PBX film. The thickness of the PBX film is 1.1 μm as measured by the electron microscope, as attached figure 1 shown.

[0036] The volume fractions of HMX in PBX films were 0, 1, 5, 8, and 10%, respectively. to N 2 Molecules are probes, and the gas p...

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Abstract

The invention discloses a method for characterizing interface structures in plastic bonded explosive on the basis of gas permeation processes. The method includes steps of A, testing gas permeability coefficients of bonders and gas permeability coefficients of at least one piece of PBX (polymer bonded explosive) with explosive contents unequal to zero by the aid of gas molecules under certain pressure and temperature conditions; B, fitting the gas permeability coefficients of the bonders and the gas permeability coefficients of the PBX by the aid of improved HIM (hierarchical hashing index models) and acquiring the thicknesses of interface cavities in the PBX by means of computing. The gas molecules are used as probes. The gas permeability coefficients of the bonders and the gas permeability coefficients of the PBX are obtained at the step A by means of testing. The method has the advantages that technologies for characterizing the interface structures in the PBX are simple and feasible, the interface structures in the PBX can be quantitatively characterized in nanometer scales, important effects can be realized for research on evolution rules of the interface structures in the PBX under temperature and stress loading conditions, and an effective way can be provided for investigating influence rules of different bonding agents on the interface structures in the PBX.

Description

technical field [0001] The invention belongs to the technical field of PBX structure characterization, and in particular relates to a method for characterization of the interface structure in plastic bonded explosives based on a gas permeation method. Background technique [0002] PBX is a kind of high-filling composite material with polymer plastic as the continuous phase and high-energy explosive crystal as the dispersed phase. It is an important special functional material and structural component in the weapon system. widely used. However, due to impacts such as temperature and stress during processing, transportation and storage, it is very likely that various forms of microstructural changes and internal damage accumulation will form inside the PBX components, which will affect the physical and chemical properties of the PBX components and lead to explosive components. deterioration, degradation of mechanical properties, decline in bearing capacity, and even macroscop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/082G01N15/088
Inventor 李诗纯刘渝罗毅威曾泽华余数温
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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