CN110304978B - High mechanical property low impedance polymer bonded explosive and preparation method thereof - Google Patents
High mechanical property low impedance polymer bonded explosive and preparation method thereof Download PDFInfo
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- 239000002360 explosive Substances 0.000 title claims abstract description 116
- 229920000642 polymer Polymers 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 50
- 229920002396 Polyurea Polymers 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 239000012948 isocyanate Substances 0.000 claims description 14
- 150000002513 isocyanates Chemical class 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- 150000002148 esters Chemical class 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052987 metal hydride Inorganic materials 0.000 claims description 4
- 150000004681 metal hydrides Chemical class 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 4
- 108010064470 polyaspartate Proteins 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 3
- -1 titanium hydride Chemical compound 0.000 claims description 3
- 239000001993 wax Substances 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- RSHAOIXHUHAZPM-UHFFFAOYSA-N magnesium hydride Chemical compound [MgH2] RSHAOIXHUHAZPM-UHFFFAOYSA-N 0.000 claims description 2
- 229910012375 magnesium hydride Inorganic materials 0.000 claims description 2
- 229910000048 titanium hydride Inorganic materials 0.000 claims description 2
- 239000003975 dentin desensitizing agent Substances 0.000 claims 5
- 239000002131 composite material Substances 0.000 abstract description 27
- 150000001875 compounds Chemical class 0.000 abstract description 8
- 239000011230 binding agent Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 description 17
- 230000001070 adhesive effect Effects 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 10
- 239000010949 copper Substances 0.000 description 10
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- IBOFVQJTBBUKMU-UHFFFAOYSA-N 4,4'-methylene-bis-(2-chloroaniline) Chemical compound C1=C(Cl)C(N)=CC=C1CC1=CC=C(N)C(Cl)=C1 IBOFVQJTBBUKMU-UHFFFAOYSA-N 0.000 description 7
- 229940090898 Desensitizer Drugs 0.000 description 7
- 241001112258 Moca Species 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 229920000608 Polyaspartic Polymers 0.000 description 4
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 4
- IWEDIXLBFLAXBO-UHFFFAOYSA-N dicamba Chemical compound COC1=C(Cl)C=CC(Cl)=C1C(O)=O IWEDIXLBFLAXBO-UHFFFAOYSA-N 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 206010010214 Compression fracture Diseases 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004954 Polyphthalamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000005245 nitryl group Chemical group [N+](=O)([O-])* 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006375 polyphtalamide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0066—Shaping the mixture by granulation, e.g. flaking
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/001—Fillers, gelling and thickening agents (e.g. fibres), absorbents for nitroglycerine
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
本发明为一种高力学性能低阻抗高聚物粘结炸药及其制备方法，属于复合含能材料技术领域。本发明炸药由一定配比的高分子粘结材料聚脲、含能材料、炸药性能改善剂制备而成。本发明炸药是通过引入新型粘结剂双组分慢反应聚脲，对高能炸药等进行有效复合，从而显著提高了含能复合物的力学性能，同时解决了现有高能复合炸药附着力低和声阻抗高问题。本发明的高力学性能高聚物粘结炸药提高了炸药组分之间以及炸药和周围盛装材料之间的结合强度，对于含能复合物的力学性能改善以及装药综合性能的提高具有重要的应用价值。此外，本发明炸药在常温下制备，无废水、废液和废气等产生，具有安全环保、工艺简单等优点。The invention relates to a high-mechanical-performance low-impedance high polymer bonded explosive and a preparation method thereof, belonging to the technical field of composite energetic materials. The explosive of the invention is prepared from a certain proportion of the polymer binding material polyurea, the energetic material and the explosive performance improving agent. The explosive of the present invention effectively composites high-energy explosives and the like by introducing a new type of binder two-component slow-reaction polyurea, thereby significantly improving the mechanical properties of the energy-containing composites, and simultaneously solves the problem of low adhesion and poor adhesion of the existing high-energy composite explosives. High acoustic impedance problem. The high-mechanical-performance polymer-bonded explosive of the present invention improves the bonding strength between explosive components and between the explosive and surrounding materials, which is important for the improvement of the mechanical properties of the energetic compound and the improvement of the comprehensive performance of the charge. Value. In addition, the explosive of the present invention is prepared at normal temperature, without generation of waste water, waste liquid and waste gas, and has the advantages of safety, environmental protection, simple process and the like.
Description
Technical Field
The invention relates to the technical field of composite energetic materials, in particular to a high-mechanical-property low-impedance high polymer bonded explosive and a preparation method thereof.
Background
The adhesive used for the high polymer bonded explosive is usually organic high polymer, and is mainly used as an adhesive component for bonding when used for a composite explosive, and also can be used as a desensitizer and an explosive carrier.
The traditional high polymer bonded explosive has a plurality of types of bonding agents, and can be roughly divided into three types according to the compound structure: the hydrocarbon type, the fluorocarbon type, and the energetic type. (1) Hydrocarbon type binders include vinyl addition polymers such as polyisobutylene, polystyrene, polyacrylic acid and vinyl acetate; polyvinyl alcohols and acetals thereof; polyphthalamides, linear polyesters, and the like. In addition, there are thermosetting resins such as unsaturated polyester resins, epoxy resins, phenol resins, and the like. The main problem with these binders is that they are sensitive to shock, impact and other such stimuli due to the mechanical properties of the polymers themselves, such as being hard, brittle, crunchy and the like. In the last 60 years, polyurethane is used as an adhesive of RDX and HMX, and the prepared PBX is in a rubber state and insensitive to impact, so that the problem of brittleness of the PBX is well solved. Thermoplastic polyurethanes have received increasing attention in replacing the binders in previous explosive formulations due to their excellent overall properties. (2) The fluorine-containing copolymers F2314, F2311, F2603, etc. belong to the fluorocarbon type, and have the main advantages of higher thermal stability and chemical stability, but the synthesis is difficult, the price is high, and the coating is easy to be debonded, and the fluorine-containing copolymers are mainly used in devices with higher requirements on heat resistance and stability. (3) The energetic type is mainly a high polymer containing nitryl, and contains energy, but has poor thermal stability, chemical stability and compatibility and higher sensitivity.
In conclusion, the mechanical properties of the explosives prepared by the traditional binding agents limit the performance of the high polymer composite explosives, and particularly, the adhesive force of the binding agents and the matrix is still insufficient under the action of external high impact. The material prepared by the traditional binder material has higher acoustic impedance, is easy to accept the impact energy transmitted from the outside under the action of external shock waves, reduces the difficulty of shock initiation of the material and influences the use safety of the material. In addition, in the production process of the high polymer bonded explosive, the environmental and safety problems of waste water, waste gas, waste liquid, complex process and the like still exist under most conditions.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a high-polymer bonded explosive with high mechanical property and low impedance, which is used for improving the mechanical property of an energy-containing compound and improving the comprehensive property of explosive loading.
The invention is realized by the following technical scheme:
a high-mechanical-property low-impedance high polymer bonded explosive is prepared from the following raw materials in parts by weight: 15-60 parts of polymer binding material polyurea, 40-85 parts of energetic material and 0-5 parts of explosive property improver; wherein, the polymer binding material polyurea and the energetic material are main materials, and the explosive property improver is an auxiliary material.
In the invention, a high-molecular bonding material, namely bi-component slow-reaction polyurea, is used as a high-molecular bonding agent, the bi-component slow-reaction polyurea is a macromolecular polymer with a urea bond obtained by the reaction of an isocyanate component and a curing agent (MOCA, MDBA, polyaspartate and the like), a catalyst or heating is not needed for the fast reaction, and the material has high solid content, does not contain volatile organic compounds and has slow reaction. And meanwhile, the urea bond has high strength, is very stable, has high ductility, excellent corrosion resistance and good mechanical property, is easy to absorb surrounding environment materials, and has high adhesive force. In addition, a large number of urea bonds exist in the polyurea molecules, and the contained hydrogen atoms can form coordination with a large number of nitroxides in the explosive molecules, so that the high polymer adhesive can be tightly combined with the explosive crystal, and the adhesive property with the explosive is obviously improved. The energetic material may be selected from any type of high explosive. In order to improve the performance of the explosive and the charge, the explosive performance improving agent is supplemented, for example, in order to reduce the sensitivity of the explosive, a small amount of the sensitivity reducing agent can be added, for example, in order to increase the explosion heat and the work capacity of the explosive, a high-energy additive can be added, for example, in order to prepare energetic compounds with different colors, a small amount of pigment can be added. The addition amount of the explosive property improving agent is not more than 5 percent.
As a preferred technical scheme, the energetic material is an elementary high explosive. Because the elementary substance high explosive contains nitro, the elementary substance high explosive is beneficial to interacting with polyurea to form stronger acid-base coordination according to an acid-base coordination theory, and the using effect is better.
As a preferred technical scheme, the single-substance high explosive is one or a mixture of RDX (hexogen), HMX (HMX) and CL-20 in any proportion.
As a preferred technical scheme, the explosive property improving agent is one or a mixture of a plurality of desensitizers, high-energy additives, plasticizers and pigments in any proportion.
As a preferable technical scheme, the desensitizer adopts graphite desensitizer or wax desensitizer.
As the preferred technical scheme, the graphite desensitizer adopts colloidal graphite, graphene and graphite fluoride; the wax desensitizer is paraffin.
Preferably, the high-energy additive is metal powder or metal hydride powder.
As the preferred technical scheme, the metal powder adopts magnesium powder, aluminum powder and titanium powder; the metal hydride powder adopts magnesium hydride powder and titanium hydride powder.
As a preferable technical scheme, DOA (dioctyl adipate) or DOS (dioctyl sebacate) is adopted as the plasticizer.
Further, the invention also provides a preparation method of the high-mechanical-property low-impedance high polymer bonded explosive, which comprises the following steps:
1) pouring the energetic material and the explosive property improver in the specified weight parts into a container, and stirring and mixing uniformly;
2) taking the specified weight part of the polymer binding material polyurea, firstly adding the component A into a container, stirring and mixing uniformly, then adding the component R into the container, and continuing stirring and mixing uniformly;
3) and pouring the mixture into the device or coating the mixture on the surface of the device, and curing at normal temperature to obtain the high polymer bonded explosive with high mechanical property and low impedance.
In the method, the component A of the high-molecular binding material polyurea is isocyanate, the component R is a curing agent, and the curing agent is MOCA (3, 3' -dichloro-4, 4' -diaminodiphenylmethane), MDBA (4, 4' -bis-sec-butyl aminodiphenylmethane) or polyaspartic acid ester.
Compared with the existing high-molecular bonded explosive, the high-molecular bonded explosive with high mechanical property and low impedance of the invention effectively compounds high-energy explosive and the like by introducing novel adhesive bi-component slow-reaction polyurea, thereby obviously improving the mechanical property of energy-containing compound and simultaneously solving the problems of low adhesive force and high acoustic impedance of the existing high-energy compound explosive. The high-mechanical-property polymer bonded explosive disclosed by the invention improves the bonding strength among explosive components and between the explosive and surrounding containing materials, and has important application value for improving the mechanical property of an energy-containing compound and the comprehensive property of explosive loading. The high-mechanical-property low-impedance high polymer bonded explosive can be prepared into a density of 1.2-1.6 g/cm by adjusting different proportions in the preparation process3Sound velocity of 1100m/s to 2500m/s, low acoustic impedance and adjustable power, and the explosive can meet the use requirement under the condition of high-speed impact. In addition, the high-mechanical-property low-impedance polymer bonded explosive is prepared at normal temperature, does not generate waste water, waste liquid, waste gas and the like, and has the advantages of safety, environmental protection, simple process and the like.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A high-mechanical-property low-impedance high polymer bonded explosive is prepared from the following raw materials in parts by weight: 60 parts of polymer binding material polyurea, 40 parts of energetic material and 0.3 part of explosive property improver; wherein the polymer binding material polyurea comprises 40 weight parts of isocyanate of component A and 20 weight parts of polyaspartic ester of component R; the energetic material adopts HMX (HMX); the explosive property improver adopts colloidal graphite.
The preparation method of the high-mechanical-property low-impedance high polymer bonded explosive comprises the following steps:
1) putting 40 parts by weight of HMX into a container at room temperature, adding 0.3 part by weight of colloidal graphite into the container, stirring and mixing uniformly by using a wood shovel, and passivating the HMX;
2) adding 40 parts by weight of isocyanate of the component A into a container, stirring and mixing uniformly by using a copper bar, then adding 20 parts by weight of polyaspartic ester of the component R into the container, and continuously stirring and mixing uniformly by using the copper bar;
3) and (3) drying the sand-blasted 45# steel box, pouring the mixture into the box, casting the mixture into tablets with the thickness of 5mm, and curing the tablets at normal temperature to obtain the high-mechanical-property low-impedance high polymer bonded explosive.
And (3) maintaining the composite explosive for 3 days, and then carrying out performance test on the composite explosive. The test result shows that the sound velocity of the composite explosive prepared by the formula is 1100m/s, and the density of the composite explosive is about 1.2g/cm3. The adhesion force between the steel wire and the 45# steel box matrix can reach 38.5MPa by using a pull-off method for field measurement. The explosive has low sound velocity, high adhesive force and excellent performance.
Example 2
A high-mechanical-property low-impedance high polymer bonded explosive is prepared from the following raw materials in parts by weight: 20 parts of polymer binding material polyurea, 75 parts of energetic material and 3 parts of explosive property improver; wherein the polymer binding material polyurea comprises 12 weight parts of isocyanate of component A and 8 weight parts of MOCA of component R; the energetic material adopts RDX (hexogen); the explosive property improver adopts paraffin.
The preparation method of the high-mechanical-property low-impedance high polymer bonded explosive comprises the following steps:
1) putting 75 parts by weight of RDX into a container at room temperature, adding 3 parts by weight of paraffin into the container, stirring and mixing uniformly by using a wood shovel, and passivating the RDX;
2) adding 12 parts by weight of isocyanate of the component A into a container, stirring and mixing uniformly by using a copper bar, then adding 8 parts by weight of MOCA of the component R into the container, and continuously stirring and mixing uniformly by using the copper bar;
3) and (3) drying the sand-blasted 45# steel die, pouring the mixture into the die, casting the mixture into tablets with the thickness of 5mm and powder columns with the thickness of phi 20mm multiplied by 20mm, and curing the mixture at normal temperature to obtain the high-mechanical-property low-impedance high polymer bonded explosive.
And (3) maintaining the composite explosive for 3 days, and then carrying out performance test on the composite explosive. The test result shows that the sound velocity of the composite explosive prepared by the formula is 2220m/s, and the density of the composite explosive is about 1.6g/cm3. The adhesion force between the steel and a 45# steel matrix can reach 10.8MPa by using a pull-open method for field measurement. The compression fracture strength of the grain was 20.4MPa, and the compression fracture strain was 3.05%. Has lower sound velocity, higher adhesive force and compressive strength and excellent mechanical property.
Example 3
A high-mechanical-property low-impedance high polymer bonded explosive is prepared from the following raw materials in parts by weight: 15 parts of polymer binding material polyurea, 60 parts of energetic material and 1.5 parts of explosive property improver; wherein the polymer binding material polyurea comprises 10 weight parts of isocyanate of component A and 5 weight parts of MDBA of component R; the energetic material adopts CL-20; the explosive property improver adopts graphene and DOA.
The preparation method of the high-mechanical-property low-impedance high polymer bonded explosive comprises the following steps:
1) at room temperature, putting 60 parts by weight of CL-20 into a container, adding 1 part by weight of graphene and 0.5 part by weight of DOA into the container, stirring and mixing uniformly by using a wood shovel, and passivating the CL-20;
2) adding 10 parts by weight of isocyanate of the component A into a container, stirring and mixing uniformly by using a copper bar, then adding 5 parts by weight of MDBA of the component R into the container, and continuously stirring and mixing uniformly by using the copper bar;
3) and (3) drying the sand-blasted 45# steel box, pouring the mixture into the box, casting the mixture into tablets with the thickness of 5mm, and curing the tablets at normal temperature to obtain the high-mechanical-property low-impedance high polymer bonded explosive.
And (3) maintaining the composite explosive for 3 days, and then carrying out performance test on the composite explosive. The test result shows that the sound velocity of the composite explosive prepared by the formula is 2500m/s, and the density of the composite explosive is about 1.53g/cm3. The explosive has low sound velocity, high adhesive force and excellent performance.
Example 4
A high-mechanical-property low-impedance high polymer bonded explosive is prepared from the following raw materials in parts by weight: 38 parts of polymer binding material polyurea, 85 parts of energetic material and 5 parts of explosive property improver; wherein the polymer binding material polyurea comprises 23 weight parts of isocyanate of component A and 15 weight parts of MOCA of component R; the energetic material adopts HMX; the explosive property improver adopts graphite oxide and aluminum powder.
The preparation method of the high-mechanical-property low-impedance high polymer bonded explosive comprises the following steps:
1) putting 85 parts by weight of HMX into a container at room temperature, adding 2 parts by weight of graphite oxide and 3 parts by weight of aluminum powder into the container, stirring and mixing uniformly by using a wood shovel, and passivating the HMX;
2) adding 23 parts by weight of isocyanate of the component A into a container, stirring and mixing uniformly by using a copper bar, then adding 15 parts by weight of MOCA of the component R into the container, and continuing stirring and mixing uniformly by using the copper bar;
3) and (3) drying the sand-blasted 45# steel box, pouring the mixture into the box, casting the mixture into tablets with the thickness of 5mm, and curing the tablets at normal temperature to obtain the high-mechanical-property low-impedance high polymer bonded explosive.
And (3) maintaining the composite explosive for 3 days, and then carrying out performance test on the composite explosive. The test result shows that the sound velocity of the composite explosive prepared by the formula is 2150m/s, and the density of the composite explosive is about 1.5g/cm3. The explosive has low sound velocity, high adhesive force and excellent performance.
Example 5
A high-mechanical-property low-impedance high polymer bonded explosive is prepared from the following raw materials in parts by weight: 30 parts of polymer binding material polyurea and 50 parts of energetic material; wherein the polymer binding material polyurea comprises 20 weight parts of isocyanate of component A and 10 weight parts of polyaspartic ester of component R; RDX is adopted as energetic material.
The preparation method of the high-mechanical-property low-impedance high polymer bonded explosive comprises the following steps:
1) at room temperature, 50 parts by weight of RDX is put into a container and stirred and mixed uniformly by a wood shovel;
2) adding 20 parts by weight of isocyanate of the component A into a container, stirring and mixing uniformly by using a copper bar, then adding 10 parts by weight of polyaspartic ester of the component R into the container, and continuously stirring and mixing uniformly by using the copper bar;
3) and (3) drying the sand-blasted 45# steel box, pouring the mixture into the box, casting the mixture into tablets with the thickness of 5mm, and curing the tablets at normal temperature to obtain the high-mechanical-property low-impedance high polymer bonded explosive.
And (3) maintaining the composite explosive for 3 days, and then carrying out performance test on the composite explosive. The test result shows that the sound velocity of the composite explosive prepared by the formula is 1560m/s, and the density of the composite explosive is about 1.3g/cm3. The explosive has low sound velocity, high adhesive force and excellent performance.
The above description is only for the preferred embodiment of the present invention, and the embodiment of the present invention is not limited by the above-described embodiment. It should be understood that numerous other modifications and embodiments can be devised by those skilled in the art, which fall within the spirit and scope of the principles of this invention.
Claims (9)
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| CN109206283A (en) * | 2018-03-16 | 2019-01-15 | 湖北航天化学技术研究所 | Low Vulnerability Explosive of a kind of thermosetting property and preparation method thereof |
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| US5600088A (en) * | 1988-10-27 | 1997-02-04 | Aerojet General Corporation | Coatings for solid propellants |
| CN109206283A (en) * | 2018-03-16 | 2019-01-15 | 湖北航天化学技术研究所 | Low Vulnerability Explosive of a kind of thermosetting property and preparation method thereof |
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