Method for enhancing mechanical properties of cast explosives

A technology of casting explosives and mechanics, which is applied in the direction of explosives, explosives processing equipment, non-explosive/non-thermal agent components, etc. It can solve the problems of difficult dispersion and unsatisfactory modification effect, and achieve uniform and stable distribution and good mechanical enhancement effect , the effect of reducing energy loss

Inactive Publication Date: 2020-12-22
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used polymers and carrier explosives are only simply physically mixed, and it

Method used

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  • Method for enhancing mechanical properties of cast explosives
  • Method for enhancing mechanical properties of cast explosives
  • Method for enhancing mechanical properties of cast explosives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh a certain amount of DNAN and melt it;

[0026] (2) Add a certain mass of 123 resin / DES to the molten DNAN, the mass ratio of 123 resin to DES is 50:1, the total addition ratio of the modifier is 1% of the total explosive system, and stir for 10 minutes to make it evenly dispersed , the stirring rate is 100rpm;

[0027] (3) Add HMX, Al powder, and AP solid phase components to the above system, with a total mass ratio of 70%, stir for 20 minutes under normal pressure, and stir for 5 minutes under vacuum, with a stirring rate of 45 rpm;

[0028] (4) After the vacuum is released, the above-mentioned materials are cast in a mold, solidified and formed under normal temperature and pressure, and made into a cast explosive.

Embodiment 2

[0030] (1) Take a certain quality of TNT and melt it;

[0031] (2) Add a certain mass of GAP / N100 to the molten TNT, the mass ratio of GAP to N100 is 20:1, the total addition ratio of the modifier is 1.5% of the total explosive system, stir for 10 minutes to make it disperse evenly, stir The speed is 100rpm;

[0032] (3) Add RDX and Al powder to the above system with a mass ratio of 70%, stir for 20 minutes under normal pressure, and stir for 10 minutes under vacuum, with a stirring rate of 50 rpm;

[0033] (4) After the vacuum is released, the above-mentioned materials are cast in a mold, solidified and formed under normal temperature and pressure, and made into a cast explosive.

Embodiment 3

[0035] (1) Take a certain quality of MINI and melt it;

[0036] (2) Add a certain quality of PBT / TDI to the molten MINI, the mass ratio of PBT and TDI is 10:1, the total addition ratio of the modifier is 1% of the total explosive system, stir for 10 minutes to make it disperse evenly, stir The speed is 100rpm;

[0037] (3) Add RDX and Al powder to the above system, add other components with a mass ratio of 65%, stir for 20 minutes under normal pressure, and stir for 10 minutes under vacuum, with a stirring rate of 30 rpm;

[0038] (4) After the vacuum is released, the above-mentioned materials are cast in a mold, solidified and formed under normal temperature and pressure, and made into a cast explosive.

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PUM

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Abstract

The invention discloses a method for enhancing mechanical properties of a cast explosive. The method is characterized in that a mechanical modifier is added into the cast explosive to enhance the mechanical properties of the cast explosive; the mechanical modifier comprises pentaerythritol acrolein resin, glycidyl azide polymer, 3,3'-diazidomethylepoxybutane-tetrahydrofuran prepolymer and an ethylene oxide-tetrahydrofuran prepolymer; and a prepolymer/curing agent system is added into the molten explosive, and the ratio of a curing agent is regulated, so the modifier is subjected to a curing reaction in a process period of the cast explosive, and a three-dimensional continuous network is formed in the system. The method has the advantages that the original preparation process of the cast explosive is not changed, and mechanical enhancement effect is good; and meanwhile, the energy loss of the explosive is reduced due to the fact that the modifier has an energetic group or an oxygen-enriched structure.

Description

technical field [0001] The invention relates to the technical field of energetic materials, in particular to a method for enhancing the mechanical properties of melt-cast explosives. Background technique [0002] Fusion-cast explosives refer to mixed explosives in which high-energy solid phase particles are added to molten carrier explosives to form a suspension system and then cast. Solid-molten state-resolidification process. The problems gradually exposed in the preparation and use of melt-cast explosives make its safety performance not meet the technical requirements of insensitive ammunition: it is a low-strength brittle material with poor elasticity and toughness. Brittle powders with low elasticity are prone to stress concentration when subjected to external force, resulting in unexpected reactions. Due to the mechanical stress and thermal stress in the process of manufacturing, storage and transportation, the charge with poor toughness will generate strong friction...

Claims

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Application Information

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IPC IPC(8): C06B21/00C06B23/00C06B45/10C06B33/12
CPCC06B21/0058C06B23/001C06B33/12C06B45/10
Inventor 肖春郑向阳王德海郑保辉祝青罗观李尚斌
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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