CN111423291A

CN111423291A - Compound PBX explosive

Info

Publication number: CN111423291A
Application number: CN202010296254.8A
Authority: CN
Inventors: 郭昕; 高杰; 金大勇; 牛磊; 牛国涛
Original assignee: Xian Modern Chemistry Research Institute
Current assignee: Xian Modern Chemistry Research Institute
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-17

Abstract

The invention discloses a compound PBX explosive, which aims to solve the problems of low safety performance and poor manufacturability in the prior art. The invention comprises the following components in percentage by mass: 25 to 42 percent of hexanitrohexaazaisowurtzitane, 30 to 35 percent of aluminum powder, 15 to 30 percent of ammonium perchlorate, 5 to 8 percent of hydroxyl-terminated polyether, 4 to 6 percent of diphenyl isooctyl phosphate, 0.2 to 0.4 percent of coupling agent, 3 to 6 percent of thermoplastic elastomer, 0.1 to 0.6 percent of surfactant and 0.1 to 0.5 percent of curing agent. On the basis of not reducing the explosion performance, the friction percentage is reduced by 100 percent, the shock wave sensitivity is reduced by 21.9 percent, the viscosity value is reduced by 24.4 percent, and the effective mixing time is reduced by 50 percent, so that the explosive preparation process performance is more excellent, and the safety performance is more reliable.

Description

Compound PBX explosive

Technical Field

The invention relates to a composite PBX explosive which is suitable for charging explosive at the warhead of large blasting.

Background

In order to improve the energy of cast explosives, ammonium perchlorate oxidizer is usually added, and composite cast PBX explosives are developed, for example, a composite cast PBX explosive (Z L201318003206.7) in a patent of 'composite cast PBX explosive' granted in 2016 and 6 months has been described, wherein the explosive has an explosion heat value of 8480J/g and an explosion velocity value of 6710m/s, and along with the requirements of an insensitive high-energy weapon on the explosive, the prior art has lower safety performance and poorer process performance, and the rapid development of the current insensitive high-energy weapon is difficult to meet.

Disclosure of Invention

In order to overcome the defects of the background art, the invention provides a compound PBX explosive.

The invention conception is as follows: the addition of the coupling agent in the explosive formula design can improve the bonding characteristic of the liquid-phase insensitive material and the solid-phase energetic material and improve the explosive insensitive performance; the addition of the thermoplastic elastomer enables the explosive to increase the phase change process in a high-temperature environment, and reduces the mechanical sensitivity of the explosive; the addition of the surfactant can reduce the viscosity value of the explosive slurry, effectively improve the process performance, reduce the mixing time and reduce the process cost.

The composite PBX explosive provided by the invention comprises the following components in percentage by mass: 25-42% of hexanitrohexaazaisowurtzitane, 30-35% of aluminum powder, 15-30% of ammonium perchlorate, 5-8% of hydroxyl-terminated polyether, 4-6% of diphenylisooctyl phosphate, 0.2-0.4% of coupling agent, 3-6% of thermoplastic elastomer, 0.1-0.6% of surfactant and 0.1-0.5% of N100, wherein the molecular weight of the hydroxyl-terminated polyether is 2800-3000.

In the preferred scheme of the invention, the components comprise the following components in percentage by mass: 33.14% of hexanitrohexaazaisowurtzitane, 32% of aluminum powder, 21.73% of ammonium perchlorate, 5.15% of hydroxyl-terminated polyether, 4.31% of diphenylisooctyl phosphate, 0.27% of tris (2-methyl-1 aziridine) phosphine oxide, 3.07% of TPU, 0.19% of sodium dodecyl sulfate and 0.14% of N100, wherein the molecular weight of the hydroxyl-terminated polyether is 2800-3000.

The invention has the advantages that: compared with the existing compound pouring PBX explosive, the invention reduces the friction percentage by 100 percent, the shock wave sensitivity by 34.5 percent, the viscosity value by 24.4 percent and the effective mixing time by 50 percent on the basis of not reducing the explosive property, so that the explosive has more excellent preparation process property and more reliable safety performance.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Example 1

The present example was carried out with reference to the following mass percentages: 33.14% of hexanitrohexaazaisowurtzitane, 32% of aluminum powder, 21.73% of ammonium perchlorate, 5.15% of hydroxyl-terminated polyether, 4.31% of diphenylisooctyl phosphate, 0.27% of tris (2-methyl-1 aziridine) phosphine oxide, 3.07% of TPU, 0.19% of sodium dodecyl sulfate and 0.14% of N100, wherein the molecular weight of the hydroxyl-terminated polyether is 2800-3000.

The preparation method comprises the following steps:

adding hydroxyl-terminated polyether, diphenyl isooctyl phosphate and TPU into high-speed rotating equipment, and mixing for 60min at the temperature of 95-100 ℃ and at the speed of 800 r/min;

continuously adding the sodium dodecyl sulfate and the coupling agent into high-speed rotating equipment, and mixing for 10min at the temperature of 95-100 ℃ and at the speed of 800 r/min;

step three, adding the materials obtained in the step two into a kneader, and mixing for 20 minutes at the temperature of 85-90 ℃, the speed of 30r/min and the vacuum degree of-0.090 MPa;

step four, continuously adding ammonium perchlorate, hexanitrohexaazaisowurtzitane and aluminum powder into a kneader in sequence, mixing for 30 minutes at the temperature of 85-90 ℃, the pressure of 20r/min and the vacuum degree of-0.090 MPa, adding N100, and mixing for 5 minutes to obtain a slurry, and pouring the slurry into a mold or a shell; and (3) placing the charging mould for 4-5 times at the temperature of 85-90 ℃ to perform slurry curing molding.

And (3) performance testing: the test items and results are shown in table 1, according to the GJB772A explosive test method.

Example 2

The present example was carried out with reference to the following mass percentages: 30.65% of hexanitrohexaazaisowurtzitane, 33% of aluminum powder, 23.4% of ammonium perchlorate, 4.83% of hydroxyl-terminated polyether, 3.31% of diphenylisooctyl phosphate, 0.31% of tris (2-methyl-1 aziridine) phosphine oxide, 4.17% of TPU, 0.19% of sodium dodecyl sulfate and 0.14% of N100, wherein the molecular weight of the hydroxyl-terminated polyether is 2800-3000.

Examples the preparation method and the performance test were the same as in example 1, and the test results are shown in table 1.

Table 1 comparison of properties with the prior art

As shown in the performance test data in Table 1, compared with the prior art, the invention has the advantages that on the basis of not reducing the explosion performance, the friction percentage is reduced by 100%, the shock wave sensitivity is reduced by 21.9%, the viscosity value is reduced by 24.4%, the effective mixing time is reduced by 50%, so that the explosive preparation process performance is more excellent, and the safety performance is more reliable.

Claims

1. A compound PBX explosive is characterized in that the components and the mass percent thereof are as follows: 25-42% of hexanitrohexaazaisowurtzitane, 30-35% of aluminum powder, 15-30% of ammonium perchlorate, 5-8% of hydroxyl-terminated polyether, 4-6% of diphenylisooctyl phosphate, 0.2-0.4% of coupling agent, 3-6% of thermoplastic elastomer, 0.1-0.6% of surfactant and 0.1-0.5% of N100, wherein the molecular weight of the hydroxyl-terminated polyether is 2800-3000.

2. The composite PBX explosive of claim 1, wherein the coupling agent is tris (2-methyl-1 aziridine) phosphine oxide.

3. The composite PBX explosive of claim 1, wherein the surfactant is sodium dodecyl sulfate.

4. The composite PBX explosive of claim 1, wherein the thermoplastic elastomer is TPU.

5. The composite PBX explosive of claim 1, wherein the components and their mass percentages are: 33.14% of hexanitrohexaazaisowurtzitane, 32% of aluminum powder, 21.73% of ammonium perchlorate, 5.15% of hydroxyl-terminated polyether, 4.31% of diphenylisooctyl phosphate, 0.27% of tris (2-methyl-1 aziridine) phosphine oxide, 3.07% of TPU, 0.19% of sodium dodecyl sulfate and 0.14% of N100, wherein the molecular weight of the hydroxyl-terminated polyether is 2800-3000.