1,5-diaminotetrazole-4N-oxide (SYX-9): a new high-performing energetic material with a calculated detonation velocity over 10 km s-1

2022 ◽  
Author(s):  
Sebastian Yocca ◽  
Matthias Zeller ◽  
Edward Byrd ◽  
Davin Piercey
Keyword(s):  
Nmr Spectroscopy ◽  
Detonation Velocity ◽  
Energetic Material ◽  
High Performing ◽  
Energetic Characterization

5-amino-1-benzyloxytetrazole was aminated with O-tosylhydroxylamine. The diaminobenzyloxytetrazolium intermediate was debenzylated to yield the highly energetic 1,5-diaminotetrazole-4N-oxide (SYX-9). The molecule underwent both chemical and energetic characterization, including 15N NMR spectroscopy and...

Detonation Velocity Measurement and Numerical Simulation for the System Consisting of Pellet Explosives and Air Gaps

2013 ◽  
Vol 767 ◽  
pp. 34-39 ◽  
Author(s):  
Shiro Kubota ◽  
Tei Saburi ◽  
Yuji Ogata ◽  
Kunihito Nagayama
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Detonation Velocity ◽  
Energetic Material ◽  
Initial Density ◽  
Detonation Products ◽  
Air Gaps ◽  
One Dimensional ◽  
Dimensional Simulation ◽  
The Relationship

The purpose of this study is to reconstruct the equation of state (EOS) whose parameters can be applied for high energetic material of arbitrary initial density without any modification. The simulation for detonation propagation in arbitrary initial density was proposed as the new method for obtaining the information of the EOS for detonation products of arbitrary initial density. At the same time, to collect the experimental data which verify the applicability of the numerical simulation, the detonation velocity for the system consisting of the pellet explosives and air gaps were conducted. The thickness of the 20 mm diameter pellet explosive was 10 mm, and air gaps were varied 0.5 mm to 2.0 mm. The relationship between detonation velocity and experimental condition was clarified for composition A5. The proposed one dimensional simulation was also conducted. The relationships between the pressure and the specific volume for detonation products were extracted from the proposed simulation

Pressure Measurement of Non-Ideal Detonation in Ammonium Nitrate Based High Energetic Material

2014 ◽  
Vol 566 ◽  
pp. 385-390 ◽  
Author(s):  
Yuuki Yamamoto ◽  
Shiro Kubota ◽  
Tei Saburi ◽  
Yuji Wada ◽  
Atsumi Miyake
Keyword(s):  
Ammonium Nitrate ◽  
Detonation Velocity ◽  
Peak Pressure ◽  
Energetic Material ◽  
Pressure Gauge ◽  
Steel Tube ◽  
Accurate Information ◽  
Detonation Pressure ◽  
Tube Test ◽  
Detonation Velocity And Pressure

In order to know accurate information on the non-ideal detonation pressure, steel tube test was carried out on ammonium nitrate (AN) and activated carbon (AC) mixtures. In this test, detonation velocity and pressure were measured simultaneously by varying thickness of PMMA placed between AN/AC and pressure gauge. The length and the diameter of the steel tube were 350 mm and 35.5 mm. The results showed that shock pressure attenuation in PMMA was not observed for this experimental condition (PMMA gap; 3-5 mm). The averaged measured peak pressure and detonation velocity were 3.4 GPa and 3.2 km/s.

Bis(3-(trinitromethyl)-1H-1,2,4-triazol-5-yl)methanone: A Mildly Acidic High-Performing Energetic Material

2021 ◽  
pp. 133520
Author(s):  
Ajay Kumar Chinnam ◽  
Jatinder Singh ◽  
Richard J Staples ◽  
Jean'ne M. Shreeve
Keyword(s):  
Energetic Material ◽  
High Performing

scholarly journals Energetic Windmill: Computational insight into planar guanidine-based nitroazole-substituted compounds as energetic materials

2021 ◽  
Author(s):  
Jingru Li ◽  
Zujia Lu ◽  
Bokun Li ◽  
Hao Wu ◽  
Jiaxuan Wu ◽  
...  
Keyword(s):  
Detonation Velocity ◽  
Energetic Materials ◽  
Density Functional ◽  
Energetic Material ◽  
Molecular Surface ◽  
Frontier Molecular Orbital ◽  
Detonation Pressure ◽  
Planar Structures ◽  
New Type ◽  
Thermochemical Parameters

In this work, we designed a series of energetic materials with a windmill-like structure based on guanidine and nitroazole, and optimized them at the B3LYP/6-311G** level using density functional theory (DFT). According to the optimization results, 6 molecules with planar structures were screened out from 28 molecules and their regularities were summarized. We calculated their geometry, natural bond orbital (NBO) charge, frontier molecular orbital, molecular surface electrostatic potential, and thermochemical parameters. In addition, their properties such as density, enthalpy of formation, detonation velocity, detonation pressure and impact sensitivity are also predicted. The result shows that this series of compounds is a promising new type of energetic material, especially compound 1 has superior detonation velocity and detonation pressure (D=9720m/s, P=41.9GPa).

Unitary bounds and controllability of quantum evolution in NMR spectroscopy

1999 ◽  
Vol 96 (12) ◽  
pp. 1739-1744 ◽  
Author(s):  
T. S. UNTIDT, S. J. GLASER, C. GRIESIN
Keyword(s):  
Nmr Spectroscopy ◽  
Quantum Evolution

Haunted by a Doppelgänger

2014 ◽  
Vol 61 (1) ◽  
pp. 12-22 ◽  
Author(s):  
Bettina von Helversen ◽  
Stefan M. Herzog ◽  
Jörg Rieskamp
Keyword(s):  
Relevant Information ◽  
Psychological Research ◽  
Decision Makers ◽  
Human Judgment ◽  
Rule Based ◽  
New Employees ◽  
High Performing ◽  
Facial Similarity ◽  
Similarity Effect ◽  
Judgment Strategy

Judging other people is a common and important task. Every day professionals make decisions that affect the lives of other people when they diagnose medical conditions, grant parole, or hire new employees. To prevent discrimination, professional standards require that decision makers render accurate and unbiased judgments solely based on relevant information. Facial similarity to previously encountered persons can be a potential source of bias. Psychological research suggests that people only rely on similarity-based judgment strategies if the provided information does not allow them to make accurate rule-based judgments. Our study shows, however, that facial similarity to previously encountered persons influences judgment even in situations in which relevant information is available for making accurate rule-based judgments and where similarity is irrelevant for the task and relying on similarity is detrimental. In two experiments in an employment context we show that applicants who looked similar to high-performing former employees were judged as more suitable than applicants who looked similar to low-performing former employees. This similarity effect was found despite the fact that the participants used the relevant résumé information about the applicants by following a rule-based judgment strategy. These findings suggest that similarity-based and rule-based processes simultaneously underlie human judgment.

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