Defence Technology
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2018
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IF 0
Teng Chen,Yan Zhang,Shuang-feng Guo,Liu-ming Zhao,Wei Chen,Ga-zi Hao,Lei Xiao,Xiang Ke,Wei Jiang
A sol-gel freezing-drying method was utilized to prepare energetic nanocomposites based on 2, 4, 6, 8, 10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane (CL-20) with 3, 3-Bis (azidomethyl) oxetane-tetrahydrofuran copolymer (BAMO-THF) as energetic gel matrix. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman, Fourier-transform infrared spectroscopy (FT-IR) and differential thermal analyser (DTA) were utilized to characterize the structure and property of the resultant energetic nanocomposites. Compared with raw CL-20, the average particle sizes of CL-20 in CL-20/BAMO-THF energetic nanocomposites were decreased to nano scale and the morphologies of CL-20 were also changed from prismatic to spherical. FT-IR detection revealed that CL-20 particles were recrystallized in BAMO-THF gel matrix during the freezing-drying process. The thermal decomposition behaviors of the energetic nanocomposites were investigated as well. The thermolysis process of CL-20/BAMO-THF nanocomposites was enhanced and the activation energy was lower compared with that of raw CL-20, indicating that CL-20/BAMO-THF nanocomposites showed high thermolysis activity. The impact sensitivity tests indicated that CL-20/BAMO-THF energetic nanocomposites presented low sensitivity performance.
研究领域:
材料科学
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爆炸物化学
✓ 已验证
产品关联
DOI
Journal of Energetic Materials
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2018
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IF 2.183
Teng Chen,Wanhui Li,Wei Jiang,GaZi Hao,Lei Xiao,Xiang Ke,Jie Liu,Han Gao
Novel 1,3,5-trinitro-1,3,5-triazine/3,3-bis (azidomethyl) oxetane-tetrahydrofuran copolymer (RDX/BAMO-THF) energetic nanocomposites were successfully prepared by a facile sol–gel freezing–drying method. The as-prepared RDX/BAMO-THF energetic nanocomposites were characterized by Raman and Fourier transform infrared spectroscopy, which revealed that RDX particles were incorporated into BAMO-THF gel matrix. Scanning electron microscopy was used to characterize the morphology and the particle size of the as-obtained samples. The results showed that RDX particles were trapped in the BAMO-THF gel matrix and the particle sizes were in nanoscale. Differential thermal analyzer (DTA) was performed to determine the thermal decomposition behaviors of BAMO-THF, raw RDX and RDX/BAMO-THF nanocomposites. The results indicated that the thermal decomposition process of RDX/BAMO-THF nanocomposites was enhanced compared with that of BAMO-THF and RDX. The kinetic, thermodynamic and thermal stability parameters were calculated according to DTA analysis. The calculated results revealed that RDX/BAMO-THF nanocomposites presented high thermal reactivity. The results of impact sensitivities for RDX/BAMO-THF nanocomposites indicated the sensitivity was effectively reduced compared to raw RDX.
研究领域:
材料科学
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化学工程
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爆炸物科学
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产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
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2025
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IF 2
Mengjing An,Yunjun Luo
Energetic thermoplastic elastomers (ETPEs) play important roles in the study of energetic adhesives. However, the contradiction between good mechanical properties and high energy constrains its further application. Using isocyanates with different structures, a poly(BAMO-THF) (PBT) energetic thermoplastic elastomer with a disordered hard-phase structure was synthesized. The special structure imparts a high mobility and a better network relaxation of molecular chains, which results in higher toughness, lower glass transition temperature, and greater self-healing ability than commonly used ETPEs. Additionally, the large but disordered hard domains enable the prominent crystallization potential of 3,3-bis(azidomethyl) oxetane (BAMO) segments to be released. Therefore, it results in better mechanical properties at a lower content of hard segments by strain-induced crystallization, achieving a balance between mechanical and energetic properties. At 20% content of hard segments, the enthalpy of formation is 1.54 kJ/g, which makes PBT elastomers have a broader application prospect in the field of explosives and propellants. Therefore, this work is of great significance in guiding the design of multifunctional materials with high energy and high mechanical properties.
研究领域:
材料科学
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含能材料
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高分子化学
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热塑性弹性体
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推进剂与炸药
✓ 已验证
产品关联
DOI
高影响因子
FirePhysChem
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2026
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IF 5.1
Xin Ruan,Yousheng Qiu,Wenwen Deng,Ligang Zhang,Jiaoyang Liu,Zeyu Wang,Hongxia Zhang,Chongwei An,Baoyun Ye
During the storage, transportation and loading processes of composite solid propellants, micro-cracks and defects will be generated, which will shorten their service life. By developing composite solid propellants with self-repairing functions, it is expected to solve these problems. Therefore, this study proposes a novel energetic self-healing binder based on dynamic disulfide bond exchange reactions and hydrogen-bond reorganization. BAMO/THF is copolymerized with GAP matrix as the soft segment; isophorone diisocyanate (IPDI) and 2,2′-diaminodiphenyl disulfide (2-AFD) are selected as the hard segments to synthesize a series of self-repairing adhesives (PGPU). After 96 hours of high and low temperature impact, the mass change rate of PGPU samples is less than 0.01%, the tensile strength change rate is less than 6%, and the fracture elongation rate change rate is less than 4%. It has excellent mechanical stability under high and low temperature environmental impact. Among them, the toughness of PGPU-3 reaches 38.93 MJ·m -3 , and the self-repair efficiency reaches 84.47% after 16 hours of fracture at 75 °C. Based on this, self-repairing composite solid propellants are prepared, and the self-repairing efficiency of the tensile strength can reach 84.28%, and the burning rates at 1 MPa, 3 MPa, and 5 MPa pressures are 10.07 mm/s, 12.19 mm/s, and 13.82 mm/s, respectively, with excellent combustion performance. This study provides new theoretical basis and feasibility schemes for designing high-energy-density self-repairing adhesives.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）