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Fabrication and thermal decomposition of glycidyl azide polymer modified nitrocellulose double base propellants 被引量:2
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作者 Benbo Zhao Tianfu Zhang +1 位作者 Zhen Ge Yunjun Luo 《Science China Chemistry》 SCIE EI CAS CSCD 2016年第4期472-477,共6页
Glycidyl azide polymer (GAP) with the advantages of non-volatility and excellent thermal stability is a candidate as a re- placement for nitroglycerine (NG) in a double base propellant. The GAP-NC double base prop... Glycidyl azide polymer (GAP) with the advantages of non-volatility and excellent thermal stability is a candidate as a re- placement for nitroglycerine (NG) in a double base propellant. The GAP-NC double base propellants were formulated with GAP and nitrocellulose (NC) fibers. Tensile test and SEM characterization indicated that GAP-NC propellants had a homoge- neous structure. Thermogravimetric analysis of GAP-NC propellants revealed that the onset decomposition temperature reached a high level ranging from 192.9 to 194.6 ℃, which indicated that the substitution of NG with GAP contributed to the safe storage and process operations for double base propellant. The result analysis of decomposition products of GAP-NC propellants showed that the main gas decomposition products of the propellants were NO, NO〉 CO, CO2, NH3, CH4, HCN, N2 CH20 and C2H40. The thermal decomposition process of the specimens was proposed. 展开更多
关键词 glycidyl azide polymers (GAP) NITROCELLULOSE double base propellant NITROGLYCERINE thermal decomposition
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Estimating energy release performance of oxidizer-activated aluminum fuel particles under ultrafast stimulus 被引量:2
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作者 Ya-ru Li Hui Ren +2 位作者 Xin-zhou Wu Hui-xin Wang Xi-long Yu 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第5期92-99,共8页
Aluminum(Al) particles are good fuel additives to improve the energy output performances of explosives. Under detonation environment, reaction delay of Al particles plays a key role in the energy release efficiency. U... Aluminum(Al) particles are good fuel additives to improve the energy output performances of explosives. Under detonation environment, reaction delay of Al particles plays a key role in the energy release efficiency. Up to date, reaction delay of Al particles is still limited by the efficiency of mass and heat transfer from oxidizers to Al particles. To address this issue, a homogeneous fuel-oxidizer assembly has recently become a promising strategy. In this work, oxidizer-activated Al fuel particles(ALG) were prepared with glycidyl azide polymer(GAP) as the oxidizer. The ALG was in uniform spherical shape and core-shell structure with shell layer of around 5 nm which was observed by scanning electron microscope and transmission electron microscope. The localized nanoscale mid-IR measurement detected the uniform distribution of characteristic absorption bond of GAP in the shell layer which confirmed the homogenous fuel-oxidizer structure of ALG. A thermal gravimetric analysis of ALG at ultrafast heating rate of 1000℃/min under argon atmosphere was conducted. The decomposition of GAP finished much earlier than that of GAP at heating rate of 10℃/min. Under ultrafast high laser fluence, the reaction response of ALG was characterized and compared with that of micro-sized Al(μAl). With the increase of laser energy, the propagation distance of the shock wave increased. However, the velocity histories were nearly the same when energies were lower than 299 mJ or higher than 706 mJ. The propagation distance of the shock wave for ALG was 0.5 mm larger than that for μAl at 2.1 μs. The underwater explosion showed the peak pressure and the shock wave energy of the ALG-based explosive were both higher than those of the μAl-based explosive at 2.5 m. This study shows the feasibility to improve the energy release of Al-based explosives via using the oxidizer-activated Al fuel particles with energetic polymer as the oxidizer. 展开更多
关键词 ALUMINUM glycidyl azide polymer Laser DETONATION EXPLOSIVE Ultrafast stimulus
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Composite Solid Rocket Propellant Based on GAP Polyurethane Matrix with Different Binder Contents 被引量:1
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作者 Islam KBoshra Ahmed Elbeih +1 位作者 GUO Lin Mohamed GZaki 《火炸药学报》 EI CAS CSCD 北大核心 2020年第4期362-367,共6页
Different GAP-based CSRP samples with different binder contents were prepared and compared with that of conventional HTPB propellant.The crosslinker mixture of trimethylol propane(TMP)and butane diol(BD)was used in th... Different GAP-based CSRP samples with different binder contents were prepared and compared with that of conventional HTPB propellant.The crosslinker mixture of trimethylol propane(TMP)and butane diol(BD)was used in the GAP matrix beside the addition of dibutyltin dilaurate(DBTDL)to ensure cross-linking and curing completion of the prepared CSRP.The viscosity and hardness of all prepared formulations were monitored continuously during the curing process.The mechanical characteristics of cured samples were tested.The burning rate at operating pressure and specific impulse were measured,while the theoretical specific impulse(I sp)was calculated by ICT code and compared with the measured results.According to the results,DOA was found to be a suitable plasticizer for GAP when using in propellant.The mechanical properties of CSRP with 25%GAP can produce the optimum mechanical behavior,which is close to that of HTPB-based CSRP.The optimum GAP-based formulation is one candidate to replace the traditional HTPB-based CSRP with high burning rate for some applications. 展开更多
关键词 physical chemistry glycidyl azide polymer(GAP) hydroxyl terminated polybutadiene(HTPB) CROSS-LINKER mechanical properties
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