Practice for Compatibility of Materials with High-Energy Propellants (Impact Sensitivity Threshold Technique)

A design strategy that including N atoms, N-oxides, and nitro groups into a cage azaadamantane at the same time was used to design 10 polyazaoxyadamantanes (PAOAs) and eight polynitroazaoxyadamantanes (PNTAOAs). First, four stable azaadamantanes were built by replacing the tertiary C atoms of an adamantane with N atoms. Then, 10 PAOAs were designed by introducing one to four N-oxides into the four azaadamantanes. After that, eight PNTAOAs were formed when the H atoms of four N-oxide-substituted azaadamantanes were replaced with different numbers of nitro groups. Finally, their heats of formation, densities, detonation properties, and impact sensitivity were estimated by using density functional theory. Among the eight PNTAOAs, seven compounds had better detonation performances than CL-20, the outstanding, novel, high-energy, and relatively insensitive cage explosive. Two compounds had higher detonation performance and lower sensitivity than CL-20 and HMX, suggesting that their overall performances are outstanding and they may be considered as the potential candidate of high-energy explosives.

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Synthesis of a new class of carbon–bonded anionic sigma complexes with 1,3-dimethyl-2,6-dioxo-5-(2,4,6-trinitrophenyl)-1,2,3,6-tetrahydropyrimidin-4-olate moiety as insensitive high energy density materials –– implications from impact sensitivity and thermal testings

Chemistry Central Journal ◽

10.1186/s13065-014-0078-8 ◽

2015 ◽

Vol 9 (1) ◽

Author(s):

Rajamani Kulandaiya ◽

Kalaivani Doraisamyraja

Keyword(s):

Energy Density ◽

High Energy ◽

Impact Sensitivity ◽

High Energy Density ◽

Sigma Complexes ◽

New Class ◽

High Energy Density Materials

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Nano-HNS Particles: Mechanochemical Preparation and Properties Investigation

Journal of Nanomaterials ◽

10.1155/2018/9436089 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 7

Author(s):

Chongwei An ◽

Shuai Xu ◽

Yuruo Zhang ◽

Baoyun Ye ◽

Xiaoheng Geng ◽

...

Keyword(s):

Short Duration ◽

Three Dimensional ◽

Specific Area ◽

High Energy ◽

Milling Process ◽

Green Technology ◽

Impact Sensitivity ◽

Safety Properties ◽

Shock Initiation ◽

Decomposition Properties

Nano-2,2′,4,4′,6,6′-hexanitrostilbene (HNS) particles were successfully prepared by a mechanochemical (i.e., high energy milling) process without an organic solvent, which can be viewed as a green technology. The particle size, morphology, specific area, crystal phase, thermal decomposition properties, impact sensitivity, and short duration shock initiation sensitivity were characterized and tested. The diameter of milling HNS is about 89.2 nm with a narrow size distribution and without agglomeration of particles. The formation mechanism of nano-HNS can be viewed as the transformation from thin HNS sheets with a one-dimensional nanostructure to three-dimensional nanoparticles. The nano-HNS particles present a much higher Ea and lower impact sensitivity than purified HNS, revealing the outstanding safety properties. From the results of the short duration shock initiation sensitivity, 50% and 100% initiation voltages are decreased compared with those of HNS-IV, indicating the higher initiation sensitivity.

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