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High polymer bonded explosive with self-repair function and preparation method thereof

A technology for bonding explosives and high polymers, which is applied in the directions of explosives, nitrification explosives, offensive equipment, etc., can solve the problems of no self-healing polyurethane bonded explosives preparation method, etc., and achieves prolonging the life of explosive components, simple preparation process and conditions. mild effect

Active Publication Date: 2018-07-27
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

These inventions have certain reference significance for the preparation of self-healing polyurethane, but from the existing public information, there is no report on the preparation method of self-healing polyurethane bonded explosives

Method used

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  • High polymer bonded explosive with self-repair function and preparation method thereof
  • High polymer bonded explosive with self-repair function and preparation method thereof
  • High polymer bonded explosive with self-repair function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Under the conditions of nitrogen protection and mechanical stirring, polytetrahydrofuran diol-1000 (30.00g, 0.03mol) after dehydration, 4,4'-diphenylmethane diisocyanate (15.02g, 0.06mol) and 40mL N, Mix N-dimethylformamide thoroughly; raise the temperature to 80°C, and react at constant temperature for 3 hours; then cool to 0°C with an ice-water bath to obtain a prepolymer solution with isocyanate at both ends. Add furfurylamine (5.83g, 0.06mol) slowly to the prepolymer solution dropwise within 20min, raise the temperature to 80°C, and react for 4h to obtain polyurethane (MPF) with furan groups at both ends. Dissolve 4,4'-methylenebis(N-phenylmaleimide) (10.75g, 0.03mol) in 20mL N,N-dimethylformamide, add it to the MPF solution, at 70°C The reaction was carried out for 3 hours to obtain a pre-finished product; the pre-finished product was poured into a polytetrafluoroethylene mold and baked in a blast oven at 60°C for 48 hours to obtain 60.50 g of thermoplastic polyuret...

Embodiment 2

[0031] Under nitrogen protection and mechanical stirring conditions, polytetrahydrofuran diol-1000 (30.00g, 0.03mol), hexamethylene diisocyanate (10.09g, 0.06mol) and 20mL N,N-dimethyl The formamide was thoroughly mixed; the temperature was raised to 80°C, and the temperature was reacted for 3 hours; then cooled to 0°C with an ice-water bath to obtain a prepolymer solution with isocyanate at both ends. Add furfurylamine (5.83g, 0.06mol) slowly to the prepolymer solution dropwise within 20min, raise the temperature to 80°C, and react for 4h to obtain polyurethane (MPF) with furan groups at both ends. Dissolve 4,4'-methylenebis(N-phenylmaleimide) (10.75g, 0.03mol) in 20mL N,N-dimethylformamide, add it to the MPF solution, at 70°C The reaction was carried out for 3 hours to obtain a pre-finished product; the pre-finished product was poured into a polytetrafluoroethylene mold and baked in a blast oven at 60°C for 48 hours to obtain 56.00 g of thermoplastic polyurethane (DAPU) with...

Embodiment 3

[0034] Under nitrogen protection and mechanical stirring conditions, polypropylene glycol-1000 (20.00g, 0.02mol), 4,4'-diphenylmethane diisocyanate (5.01g, 0.02mol) and 15mL N,N- Dimethylformamide was thoroughly mixed; the temperature was raised to 80°C, and the temperature was reacted for 3 hours; then cooled to 0°C with an ice-water bath to obtain a prepolymer solution with isocyanates at both ends. Add furfurylamine (3.89 g, 0.04 mol) slowly to the prepolymer solution dropwise within 20 min, raise the temperature to 80° C., and react for 4 h to obtain polyurethane (MPF) with furan groups at both ends. 4,4'-methylenebis(N-phenylmaleimide) (7.17g, 0.02mol) was dissolved in 20mL N,N-dimethylformamide, added to the MPF solution, at 70°C React for 3 hours to obtain a pre-finished product; pour the pre-finished product into a polytetrafluoroethylene mold and bake in a blast oven at 60°C for 48 hours to obtain 36.00 g of thermoplastic polyurethane (DAPU) with DA bonds.

[0035] D...

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Abstract

The invention provides a preparation method of a high polymer bonded explosive with a self-repair function, wherein the preparation method includes the following steps: step 1, firstly, carrying out areaction of excess diisocyanate with polyether / ester diol to produce a prepolymer with -NCO groups at both ends; step two, then, carrying out a reaction of furfuryl amine with a furan group with theprepolymer, to generate polyurethane with a furan end group; step three, carrying out a reaction of bismaleimide with the polyurethane, to generate a thermoplastic polyurethane with a DA bond; and step four, preparing a dilute solution from the thermoplastic polyurethane, and adding an explosive with metered proportioning; and heating to make the solvent gradually evaporated, then adding a properamount of deionized water, wrapping the surface of the explosive after the polyurethane is precipitated, filtering and drying, and thus obtaining the high polymer bonded explosive with the self-repairfunction. The invention also provides the high polymer bonded explosive with the self-repair function. The preparation method has the advantages of simple preparation process, mild conditions and high universality.

Description

technical field [0001] The invention relates to an explosive and a preparation method thereof, in particular to a high polymer bonded explosive with a self-repairing function and a preparation method thereof. Background technique [0002] Polymer bonded explosive is a kind of energetic composite material composed of explosive as the dispersed phase and polymer binder as the continuous phase. Due to its advantages of high energy, good forming and processing performance, etc., it is widely used in national defense and national defense. It is widely used in economic and other fields. The molding process of polymer bonded explosives often forms certain initial damages (such as voids, etc.), which are subjected to various mechanical loads and temperature loads in the subsequent processing, transportation, storage and use. New damage is generated inside the knot explosive. These damages in the form of holes and micro-cracks further evolve into larger-sized macro-cracks under the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/00C06B25/36C08G18/66C08G18/48C08G18/10C08G18/30C08G18/42
CPCC06B25/00C06B25/36C08G18/10C08G18/4277C08G18/4825C08G18/4854C08G18/2865
Inventor 李玉斌杨志剑巩飞艳丁玲张建虎潘丽萍郑雪
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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