HMX含量对PBT基推进剂撞击感度和非冲击点火反应特性的影响

杨年; 马腾; 过光飞; 吴三震; 夏语; 黄寅生; 刘大斌; 徐森

doi:10.11858/gywlxb.20230824

HMX含量对PBT基推进剂撞击感度和非冲击点火反应特性的影响

doi: 10.11858/gywlxb.20230824

南京理工大学化学与化工学院, 江苏南京　210094

基金项目: 国家自然科学基金（12272184）

详细信息

作者简介:
杨　年（1994－），男，博士，主要从事含能材料反应机理研究. E-mail：youngnian@njust.edu.cn

通讯作者:
徐　森（1981－），男，博士，研究员，主要从事含能材料危险性分级与控制技术研究. E-mail：xusen@njust.edu.cn

中图分类号: O381
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出版历程
- 收稿日期: 2023-12-20
- 修回日期: 2024-03-17
- 网络出版日期: 2024-05-25
- 刊出日期: 2024-06-03

Influences of HMX Content on the Impact Sensitivity and Non-Shock Initiation Reaction Characteristics of PBT Based Propellants

School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

摘要

摘要: 为了研究HMX的含量对PBT基推进剂撞击感度和非冲击点火反应特性的影响，开展了BAM落锤撞击感度试验、脆性试验和Susan试验。结果表明：随着HMX含量的增加，PBT基推进剂爆炸概率为50%时的特性落高（H₅₀）减小，即推进剂的撞击感度随着HMX含量的增加而增大。对于HMX的质量分数分别为0、5%、10%和15%的PBT基推进剂，其临界撞击点火速度分别为168、147、136、131 m/s，临界撞击点火速度随HMX含量的增加而减小；在撞击速度为120～300 m/s的非冲击作用下，4种PBT基推进剂的反应等级为爆炸或部分爆轰，相同撞击速度下，HMX的质量分数为10%的PBT基推进剂相较于其他3种PBT基推进剂具有更剧烈的反应等级。
- HMX /
- PBT基推进剂 /
- 撞击感度 /
- 非冲击点火 /
- 反应特性
Abstract: In order to investigate the effect of HMX content on the impact sensitivity and non-shock initiation reaction characteristics of PBT based propellants, BAM impact sensitivity tests, friability tests and Susan tests were carried out. The experimental results show that with the increase of HMX content, the characteristic drop height of PBT based propellants at 50% explosion probability (H₅₀) decreases, indicating that the impact sensitivity increases with higher HMX content. In friability tests, the critical non-shock initiation velocities for the PBT based propellants with the HMX mass fraction of 0, 5%, 10%, and 15% are 168, 147, 136, and 131 m/s, respectively, showing a decline in the critical non-shock initiation velocity as HMX content rises. In Susan tests, four different kinds of PBT based propellants react as explosion or partial detonation at velocities range of 120 m/s to 300 m/s. The PBT based propellant with the HMX mass fraction of 10% exhibits more intense reactions compared to the other three PBT based propellants at the same velocity.
- HMX /
- PBT based propellants /
- impact sensitivity /
- non-shock initiation /
- reaction characteristics

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图 1 试验装置示意图

Figure 1. Schematic diagram of the experimental setup

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图 2 4种PBT基推进剂点火的临界撞击速度

Figure 2. Critical impact ignition velocity of four kinds of PBT based propellants

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图 3 撞击前(a)和撞击50 μs后(b)PBT基推进剂图像（试样1）

Figure 3. Images of PBT based propellant before impact (a) and 50 μs after impact (b) (specimen 1)

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图 4 HMX的质量分数与PBT基推进剂的ΔE′的关系

Figure 4. Relationship between the mass fraction of HMX and ΔE′ of PBT based propellants

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图 5 不同撞击速度下4种PBT基推进剂的冲击波超压峰值

Figure 5. Shockwave overpressure peaks of four kinds of PBT based propellants after ignition with different impact velocities

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图 6 不同撞击速度下PBT基推进剂反应变化过程

Figure 6. Reaction changes of PBT based propellants after ignition with different impact velocities

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图 7 撞击后回收的钢体

Figure 7. Recovered steel body after impact

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图 8 撞击后钢体的剩余长度及动能

Figure 8. Residual lengths and kinetic energy of steel bodies after impact

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表 1 4种PBT基推进剂的组分

Table 1. Formulation of four kinds of PBT based propellants

Specimen ρ/(g·cm⁻³) w_PBT/% w_HMX/% w_AP/% w_Al/% w_A3/%

1 1.78 19 0 57 19 5
2 1.78 19 5 52 19 5
3 1.78 19 10 47 19 5
4 1.78 19 15 42 19 5

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表 2 4种PBT基推进剂的撞击感度测量结果

Table 2. Impact sensitivity test results of four kinds of PBT based propellants

Specimen w_HMX/% H₅₀/cm E/J s/cm δ/%

1 0 56.46 5.646 1.78

2 5 50.83 5.083 2.03 11.08

3 10 50.21 5.021 1.78 1.23

4 15 49.82 4.982 1.69 0.78

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