Our experiments elucidated the decomposition mechanism of energetic materials with geminal dinitro groups using 2-bromo-2-nitropropane as a photolytic precursor for two key intermediates. We used crossed laser-molecular beam scattering experiments and velocity map imaging experiments to determine the primary photodissociation channels and examine the unimolecular dissociation of the highly energized intermediates produced. Our experiments identified a novel mechanism for NO loss from nitroalkyl...
Topics: DTIC Archive, CHICAGO UNIV IL, *DECOMPOSITION, *ENERGETIC PROPERTIES, PHOTODISSOCIATION
The focus of this research was to apply efficient methods for using ab initio potential energy surfaces (PESs) computed with high levels of quantum chemistry theory to predict chemical reaction properties of energetic molecules. The project has provided results of direct relevance to understanding the chemistry of energetic materials, particularly, 1,3,3-trinitroazetidine (TNAZ) decomposition.
Topics: DTIC Archive, MISSOURI UNIV-COLUMBIA, *CHEMICAL REACTIONS, ENERGETIC PROPERTIES, QUANTUM CHEMISTRY
The Final Proceedings for New Trends in Research of Energetic Materials, 5th Seminar, 24 April 2002 - 25 April 2002. The fifth consecutive Seminar on new trends in research of energetic materials is intended to be a worlds meeting of young people and university teachers working in the field of teaching, research, development, processing, analysing and application of all kinds of energetic materials. A subject of interest for this Seminar includes also explosions of the gaseous, dispersing and...
Topics: DTIC Archive, Zeman, Svatopluk, PARDUBICE UNIV (CZECHOSLOVAKIA), *EXPLOSIVES, *ENERGETIC...
Currently DoD has no method of recovering high value energetics, such as HMX/RDX, from Class 1.1 propellants and explosives for reuse applications. DoD has over 53,000 tons of HMX/RDX material in the Resource Recovery and Disposition Account (RRDA) and expect to generate several thousand more tons over the next five years. Without a reclamation and reuse process, the value of these products are lost as they are destroyed by open burning and open detonation.
Topics: DTIC Archive, TPL INC ALBUQUERQUE NM, *EXPLOSIVES, *HMX, *PROPELLANTS, *RDX, *RECOVERY, ENERGETIC...
Experiments were performed to confine energetic nanoparticles (aluminum nanoparticles) on to a carbon nanofiber matrix in order to control the reactivity of the aluminum nanoparticles. We achieved nanohybrid materials of aluminum nanoparticles wrapped with Carbon nanofibers (CNFs) by electrospinning method. The morphology of aluminum decorated carbonized CNFs were studied by transmission electron microscopy (TEM). We found that the degree of dispersion of aluminum on CNFs changing depending...
Topics: DTIC Archive, CHONNAM NATIONAL UNIV GWANGJU (KOREA), *NANOPARTICLES, ALUMINUM, CARBON, ENERGETIC...
With the recent implementation of nano sized metal powders into energetic composites such as solid rocket propellants, incorporating metal nanoparticles with high mass loading in the propellant has become an issue. In this work, an electrospray deposition technique was employed to increase particle loading of nano aluminum (n-Al) and demonstrate the potential of the fluoropolymer, polyvinylidene fluoride (PVDF), as an energetic binder. A mass percentage of 50% n-Al in PVDF was determined to...
Topics: DTIC Archive, MARYLAND UNIV COLLEGE PARK, *ALUMINUM, COMBUSTION, ENERGETIC PROPERTIES, FILMS,...
This project investigated new energetic materials for use with a triazole cured binder system. Research was conducted in five main areas: 1) energetic materials based on the spiro[4.4]nonane system, 2) completion of our work on the 4,4- (methylenediimino)bis-1,2,5-oxadiazole-3-carboxylic acid and carboxamide, 3) a re-examination of the reaction of glyoxal with 3,4-diamino[1,2,5]oxadiazole, 4) synthesis and chemistry of 3-hydroxymethyl-4-amino[1,2,5]oxadiazole and 5) work on energetic polymers...
Topics: DTIC Archive, UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG, *ENERGETIC PROPERTIES, CHEMISTRY,...
The primary goal of this effort is to develop a fundamental understanding of silicon-based reactives, which are relatively unstudied reactive systems so that applications can be pursued. During this final year (project begun Jan. 2008), we have made significant progress especially in the following areas:1) optimizing the nano silicon synthesis, 2) finalizing our doped silicon work, 3) using multiple-scale structures in nanoporous silicon structure to control reaction, and 4) showing that...
Topics: DTIC Archive, PURDUE UNIV LAFAYETTE IN, *NANOMATERIALS, *SILICON, COMBUSTION, ENERGETIC PROPERTIES,...
Energetic materials are studied as isolated species to learn the kinetics and dynamics of their unimolecular behavior. The behavior of these species is then compared with that of very similar model systems in order to enable the synthesis of new materials that will be energetic by design. This must be the first step in the determination of the unique characteristics that comprise energetic molecules. We now understand the properties of nitramine, furazan, tetrazine, tetazole and other high...
Topics: DTIC Archive, COLORADO STATE UNIV FORT COLLINS, *ENERGETIC PROPERTIES, LASER INDUCED FLUORESCENCE,...
We have evaluated the energetics of 38 solar eruptive events observed by a variety of spacecraft instruments between 2002 February and 2006 December, as accurately as the observations allow. The measured energetic components include: (1) the radiated energy in the Geostationary Operational Environmental Satellite 1 8 band, (2) the total energy radiated from the soft X-ray (SXR) emitting plasma, (3) the peak energy in the SXR-emitting plasma, (4) the bolometric radiated energy over the full...
Topics: DTIC Archive, CALIFORNIA INST OF TECH PASADENA, *ENERGETIC PROPERTIES, *GLOBAL, FLARES, GAMMA RAYS,...
The electrodynamic, thermal and energetic character of stable Sun- aligned arcs in the polar cup can be meaningfully diagnosed by an incoherent scatter radar, provided a suitable observing scheme is selected. We report here such measurements of two intense Sun-aligned arcs. The two arcs were diagnosed on two different nights (February 26 and March 1, 1987) using the Sondre Stomfjord radar as a stand-alone diagnostic. Repeatable patterns are found in mesoscale area maps of altitude profiles for...
Topics: DTIC Archive, Valladares, C E, PHILLIPS LAB HANSCOM AFB MA, *POLAR CAP, REPRINTS, ENERGETIC...
Energetic additives offer the possibility of increased performance of rocket engines. For hydrocarbon-fueled rocket engines, however, increased performance tends to be associated with increased severity of combustion instability. An exploration of the role of fuel and flame chemistry on combustion instabilities in liquid rocket engines is presented, with the goal of determining whether changes in the fuel energy content and flame speed can improve combustion stability. A limited set of...
Topics: DTIC Archive, PURDUE UNIV LAFAYETTE IN, *COMBUSTION, *LIQUID PROPELLANTS, *ENERGETIC PROPERTIES,...
The main goal of this project has been to demonstrate the existence of novel extended solids at high pressures and temperatures and establish the viability of new functional, high energy density materials such as high-strength, insensitive CN polymers and super-oxidizing extended fluorides. There has been no major change to this original goal, and significant progresses have been made in both discoveries of the proposed functional, high-energy density candidates and developments of enabling...
Topics: DTIC Archive, WASHINGTON STATE UNIV PULLMAN, *POLYMERS, ENERGETIC PROPERTIES, FLUORIDES, HIGH...
Pulsed Power Hydrodynamics (PPH) is an application of low-impedance pulsed power, and high magnetic field technology to the study of advanced hydrodynamic problems, instabilities, turbulence, and material properties. PPH can potentially be applied to the study of the properties of warm dense matter (WDM) as well. Exploration of the properties of warm dense matter such as equation of state, viscosity, conductivity is an emerging area of study focused on the behavior of matter at density near...
Topics: DTIC Archive, LOS ALAMOS NATIONAL LAB NM, *ELECTROMAGNETIC PULSES, *HYDRODYNAMICS, ENERGETIC...
A final report of the activity related to the research on the role of defects and electronic structure on the sensitivity of energetic materials to detonation.
Topics: DTIC Archive, NEBRASKA UNIV LINCOLN, *DETONATIONS, *ENERGETIC PROPERTIES, *DEFECT ANALYSIS,...
Abstracts are presented in this book in the following areas: Energetics and Dynamics, Catalysis, Bioinorganic, Synthesis and Techniques and Applications.
Topics: DTIC Archive, King,E L, COLORADO UNIV AT BOULDER, *CHEMISTRY, SYNTHESIS, DYNAMICS, ABSTRACTS,...
The report presents the detailed formulation of nonlinear micromorphic continuum kinematics and balance equations (balance of mass; microinertia; linear, angular, and first moment of momentum; energy; and the Clausius-Duhem inequality). The theory is extended to elastoplasticity assuming a multiplicative decomposition of the deformation gradient and microdeformation tensor. A general three-level (macro, micro, and microgradient) micromorphic finite strain elastoplasticity theory results, with...
Topics: DTIC Archive, COLORADO UNIV AT BOULDER, *ELASTOPLASTICITY, NUMERICAL ANALYSIS, ELASTIC PROPERTIES,...
This grant provided partial funding for the acquisition of a powerful femtosecond laser. The laser is to be used in making femtosecond time resolved measurements of shock waves in molecular materials, with the eventual application being understanding the sensitivity to shock initiation of energetic materials. After suitable negotiations, a CPA 10 laser from Clark-MXR Corporation was selected and ordered. To save money, some parts and diagnostic equipment were ordered and shipped to Clark for...
Topics: DTIC Archive, Dlott, Dana D., ILLINOIS UNIV AT URBANA, *LASERS, SHOCK WAVES, DIAGNOSTIC EQUIPMENT,...
Piezoelectric initiators are a unique form of ignition for energetic material because the current and voltage are tied together by impact loading on the crystal. This study examines the ignition response of an energetic composite composed of aluminum (Al) and molybdenum trioxide (MoO3) nano-powders to the arc generated from a lead zirconate and lead titanate (PZT) piezocrystal. The mechanical stimuli used to activate the piezocrystal varied to assess ignition voltage, power, and delay time of...
Topics: DTIC Archive, TEXAS TECH UNIV LUBBOCK, *ENERGETIC PROPERTIES, *IGNITION, *PIEZOELECTRIC MATERIALS,...
We undertook to synthesize and experimentally determine the sporicidal efficacy against anthrax surrogate spores of two specific classes of novel energetic materials based on the general class of N,N-dihaloamine derivatives: organic N,N-difluoramine (NF2) derivatives and N,Ndichloramine (NCl2) derivatives. Sporicidal efficacies of gaseous detonation products from an N,N-difluoramine explosive, HNFX, were determined over a wide range of exposure times, ranging from milliseconds to seconds to...
Topics: DTIC Archive, NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA, *EXPLOSIVES, ANTHRAX,...
Nanocomposite reactive microspheres with diameters of 1-5 mum were created via electrostatic self-assembly of aluminum and cupric oxide nanoparticles. The ability to utilize this novel approach of bottom-up assembly to create these reactive materials allows for the potential for a more intimate mixture between the two nanoreactants and, thus, an overall more energetic combustion process. Experiments with the self-assembled material demonstrate the ability to achieve ignition and sustain a...
Topics: DTIC Archive, PENNSYLVANIA STATE UNIV UNIVERSITY PARK, *COMPOSITE MATERIALS, REACTIVITIES,...
The results of a computer program for the calculation of theoretical performance of rocket propellants are reported to be in good agreement with values computed by other programs for selected simple propellant formulations. Data for some 500 products of reaction among eighteen chemical elements are indicated as being available for use in these calculations. An extended version of the program is in preparation for external distribution.
Topics: DTIC Archive, Hanzel, P C, AEROSPACE CORP EL SEGUNDO CA, *ENERGETIC PROPERTIES, *ROCKET...
This final report summarizes the major contributions to the basic science of nanocomposite reactive materials and focuses on fundamental ignition and energy propagation behaviors. Nanometric aluminum (Al) fuel particles were examined with a variety of oxidizers including metals, metal oxides, halogens, and polymer binders. Some work was also pursued on other fuels such as boron (B) and manganese (Mn). New diagnostics were developed to resolve equilibrium as well as non-equilibrium reaction...
Topics: DTIC Archive, TEXAS TECH UNIV LUBBOCK, *COMBUSTION, *ENERGETIC PROPERTIES, *IGNITION,...
A series of furazan-based energetic materials derived from 3 ,4-diaminofurazan (DAF) were synthesized and characterized. These compounds included diaminoazoxyfurazan (DAAOF), diaminoazofurazan (DAAF), dinitroazoxyfurazan (DNAF), aminonitrofurazan (ANF), dinitrobisfurazanopyrazine (PIPER), and tetrazoxytetrafurazan (TATFO). Characterization testing included small scale safety testing (impact, friction, ESD, thermal stability), DSC analysis, vacuum thermal stability (VTS), and ingredient...
Topics: DTIC Archive, Cannizzo, Louis F, THIOKOL PROPULSION BRIGHAM CITY UT, *THERMAL STABILITY, *SOLID...
Several papers on ionic liquids have been published or submitted as a result of this grant. The first set of papers used second order perturbation theory to study the geometries and substituent effects of the cations commonly employed in energetic ionic liquids. These are variously substituted triazolium, tertazolium, and pentazolium cations. The heats of formation of all species were predicted using G2 and G3 theory. It was consistently found that the most energetic substituent's are -CN and...
Topics: DTIC Archive, IOWA STATE UNIV AMES, *DYNAMICS, *ENERGETIC PROPERTIES, *HIGH ENERGY, CRYSTALS,...
Energetic implosions, using two or three load wires to create a focused axial stagnation of dense wire cores amidst the assembled precursor plasma, are examined with respect to the trade between the implosion mass lost to precursor ablation and the mass or kinetic energy available at stagnation. The calculated kinetic energy at stagnation serves as measure for the output x-radiation.
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC RADIATION HYDRODYNAMICS BRANCH, *KINETIC ENERGY,...
In March 2003, a Marine Cobra helicopter hit an Iraqi outpost with a thermobaric Hellfire missile. President George W. Bush later stated: We used a new Hellfire missile for the first time, which can take out enemy fighters hiding on one floor of a building, without destroying the floors above and below .. .. In the coming years, there are going to be some awfully surprised terrorists when the thermobaric Hellfire comes knocking.
Topics: DTIC Archive, NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD, *GUIDED MISSILES, ENERGETIC...
Nanoscale structural cavities in ionomer membrane films were used as templates for the facile synthesis of small aluminum nanoparticles via catalytic decomposition of an alane precursor. The loading of reactive aluminum in the composite film could be varied, up to more than half of the film weight. While the embedded nanoparticles were protected by the membrane structure from any significant oxidation for the composite films to exhibit surprising stability in ambient air, they could be fully...
Topics: DTIC Archive, CLEMSON UNIV SC, *NANOPARTICLES, *ENERGETIC PROPERTIES, *MEMBRANES, ALUMINUM,...
The principal focus of this research program is the electronic structure aspects of nonadiabatic processes related to the stability, formation and detection of high energy density materials (HEDMs). During the current grant our work has focused on metal doped hydrogen as cyrogenic fuels. These studies were enabled by a unique system of computer codes, the BROOKLYN programs, that provide advanced capabilities for the study of the electronic structure aspects of spin-conserving and...
Topics: DTIC Archive, Yarkony, David R., JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF CHEMISTRY, *EXPLOSIVES,...
The major goals of this research project are to investigate the coupling of Linear Cellular Alloys (LCAs) as casings for reactive (thermite) fillers as high-energy-density structural energetic materials. The specific objectives include performing fundamental studies to: (a) investigate mechanics of dynamic densification and reaction initiation in Ta+Fe2O3 and Ta+Bi2O3 thermite powder mixtures and to (b) design and fabricate LCAs of intent (maraging steel) and reactive (tantalum) metals with...
Topics: DTIC Archive, GEORGIA INST OF TECH ATLANTA, *ALLOYS, CHEMICAL REACTIONS, DENSITY, ENERGETIC...
Infrared (IR) laser spectroscopy has been employed for both the spectroscopic and kinetic study of transient intermediates of importance in the decomposition of energetic materials using cavity ring-down spectroscopy (CRDS) and for the detection of organic residues, including energetic materials, by laser-induced breakdown spectroscopy (UBS) with infrared laser irradiation. CRDS in the hydride stretching region of the IR was employed to study the thermal decomposition of methyl azide to form...
Topics: DTIC Archive, JOHNS HOPKINS UNIV BALTIMORE MD, *EXPLOSIVE DECOMPOSITION, *RESIDUES, LASER...
The Air Force has pressing needs to develop new propellants for aircraft, rockets, and spacecraft. This work is part of the Air Force High Energy Density Matter program and it will help to develop new propellants that can make propulsion systems less expensive, safer, and more efficient. This will result in cost savings and improved mission capabilities for Air Force systems.
Topics: DTIC Archive, ALABAMA UNIV TUSCALOOSA, *CHEMICAL ENGINEERING, AMMONIUM PERCHLORATE, ANIONS,...
The focus of this work is to understand quantitatively, the nature of the reactivity of nanoparticles and nanocomposites for energetic materials application. Our approach takes two thrusts. 1. Single Particle Kinetics 2. Ensemble Fuel/Oxide Nanocomposite Kinetics.
Topics: DTIC Archive, MARYLAND UNIV COLLEGE PARK OFFICE OF RESEARCH ADMINISTRATION AND ADVANCEMENT,...
Micro thruster is a relatively new class of micro propulsion system for micro spacecraft, though there are many other potential uses in power generation, actuation of parts, and micro airborne robotics platforms. Propulsion systems of the same order of size for micro scale vehicle components do not exist, as the level of thrust and the impulse precision required for maneuvering micro scale vehicles in space orbit is deficient. The use of solid fuels in lieu of traditional liquid state fuels is...
Topics: DTIC Archive, ARMY RESEARCH LAB ADELPHI MD, *ENERGETIC PROPERTIES, *PROPULSION SYSTEMS, ACTUATION,...
The U.S. Army Research Laboratory (ARL) is developing a series of insensitive melt cast explosive formulations to replace the conventional TNT-based fills which fails to meet Insensitive Munitions (1M) requirements. These formulations are based upon a nitrate salt based eutectic mixture called DEMN. These DEMN formulations have previously been demonstrated to have significantly improved 1M response, passing 4 out of 5 1M tests in the 155mm M795 artillery projectile. Two components of this DEMN...
Topics: DTIC Archive, ALLIANT AMMUNITION AND POWDER CO RADFORD VA, *ETHYLENEDIAMINE, SALTS, INSENSITIVE...
In this AFOSR granting period, Los Gatos Research explored the capabilities of Off-Axis Integrated Cavity Output Spectroscopy (Off-Axis ICOS) with an especial emphasis towards flow-tube kinetics studies. Specifically, search was performed to ascertain the application of Off-Axis ICOS to spatial imaging, time-dependant phenomenon, and through-plasma spectroscopy. Achievements included developing a theoretical framework to simulate spot pattern images in the presence of spatially-inhomogeneous...
Topics: DTIC Archive, Gupta, Manish, LOS GATOS RESEARCH MOUNTAIN VIEW CA, *PLASMAS(PHYSICS), CAVITIES,...
The workshop developed recommendations for those computational chemistry tools best suited to attack research problems in properties of energetic molecules - individually and in condensed phases. A small, international group of experts presented their work and discussed current tools of computational chemistry in the context of the Army program of energetic material design. These experts, chosen for their specific skills, came from Europe and the US.
Topics: DTIC Archive, Szalewicz, Krzysztof, DELAWARE UNIV NEWARK DEPT OF PHYSICS, *ENERGETIC PROPERTIES,...
The new binder system rests on the Diels-Alder cycloaddition reaction between previously undisclosed components. Our identification of a novel mode of reactivity offered by cyclooctynes in biological contexts paves the way for the development of a neutral, non-toxic binder system that could directly be implemented using existing equipment. The first phase of the program was aimed at the preparation of the new components of the binder system. The cyclooctyne component was dimerized using...
Topics: DTIC Archive, NALAS ENGINEERING SERVICES INC CENTERBROOK CT, *CROSSLINKING(CHEMISTRY), BINDERS,...
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *FOREIGN TECHNOLOGY, USSR, RUSSIAN...
Non-Linear Internal Wave (NLIW) packets are ubiquitous features of the coastal ocean, producing significant changes to its acoustics, optics and biogeochemistry, and influencing its dynamics. While they arrive like clockwork in some regions like the South China Sea, they occur with a high degree of variability on most continental shelves like the New Jersey shelf site of the SW06 experiment. And even in regions where they form at regular intervals, their amplitudes can vary dramatically from...
Topics: DTIC Archive, OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES, *INTERNAL...
Scanning tunneling microscopy has been used to observe oxygen induced microfaceting of Ni(9 7 7) in the temperature range of 390-565 K. Step doubling occurs on this surface provided the step-edges are locally decorated with oxygen. In this letter, time-lapse images of this process have been used to resolve two key steps of the coalescence mechanism. Merging of steps is initiated by the bulging of one step in the downstairs direction towards its neighbor. This rate limiting step is followed by...
Topics: DTIC Archive, CHICAGO UNIV IL DEPT OF CHEMISTRY, *PHASE TRANSFORMATIONS, ENERGETIC PROPERTIES,...
Shotgun impact tests were performed by firing plexiglas projectiles at 6 mm long by 12 mm diameter propellant samples at 150 and 200 m/s impact velocities. Three different HTPB/AP propellants were tested: an Army fielded munition and two research propellants. The feasibility of a new technique, laser obscuration, was evaluated for measuring the pre- and post-impact projectile velocity history. Using less than ideal optical components, the present system is able to measure the pre-impact...
Topics: DTIC Archive, Duffy, K P, VANDERBILT UNIV NASHVILLE TN, *SHOTGUNS, VELOCITY, PROJECTILES, IMPACT...
An essential need of the US Air Force is the discovery, development, and fielding of new, energetic materials for advanced chemical propulsion in space and missile applications. Some of the key factors driving the requirement for new chemical propellants include: (a) improved performance in terms of increased specific impulse and density, (b) reduced sensitivity to external stimuli such as impact, friction, shock, and electrostatic discharge, and (c) mitigation of environmental and...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE, *LIQUIDS, *PROPELLANTS,...
In an effort to understand the details of shock compression of molecules used in energetic materials, we have conducted femtosecond laser experiments where a monolayer of energetic material simulants such as nitrobenzenethiol are subjected to a laser-driven shock wave while vibrational spectroscopy is used to probe their response. A monolayer is needed to attain the high time and space resolution necessary to make a detailed comparison to simulations. In support of the shock compression...
Topics: DTIC Archive, ILLINOIS UNIV AT URBANA-CHAMPAIGN, *SHOCK WAVES, *VIBRATIONAL SPECTRA, *MOLECULES,...
This proposed research addressed two areas of reactive materials (RM) research that can potentially improve DoD capabilities for defeat of WMDs. The first concept seeks to enhance feasibility of weaponizing RMs by researching a novel route to the production of metal-matrix composite RM casings and liners - infiltration of dense inert fibrous grids (e.g W wire) with castable lighter energetic metals (e.g. Al). This approach would potentially yield a route to practical, cost-effective production...
Topics: DTIC Archive, ILLINOIS UNIV AT URBANA-CHAMPAIGN, *ENERGETIC PROPERTIES, *HYDROGEN, *METAL MATRIX...
We have processed more than 50 hours of TODWL data from both the Monterey and DPG areas. We have begun combining the information from the TODWL, CTV and Twin Otter sensors to establish the relationship between the local fluxes and the energetic of LLJs and OLEs. We have also begun to modify the EDMF (Eddy Diffusivity and Mass Flux) parameterization to account for the differences between thermally driven convection and dynamically driven vertical transports. The WRF model has been setup and run...
Topics: DTIC Archive, SIMPSON WEATHER ASSOCIATES INC CHARLOTTESVILLE VA, *COASTAL REGIONS, *OPTICAL RADAR,...
This report summarizes the major results obtained in the studies of gas-generating compositions involving novel nanocomposite and mechanically alloyed reactive materials, produced by arrested reactive milling. An experimental setup that allows laser ignition, high-speed and infrared video recording, and mass spectrometric analysis of evolved gases has been designed and constructed. The experiments have shown that mechanically alloyed Al/Mg powder is a promising alternative to iron and tin in...
Topics: DTIC Archive, Shafirovich,Evgeny, University of Texas at El Paso El Paso United States, Energetic...
Recent laboratory investigations of space simulated electron beam plasma interactions have concentrated on the transition from single particle behavior to collective plasma processes with emphasis on the beam plasma discharge. The plasma has been characterized with respect to its spatial distributions in density, temperature and density fluctuation power spectra. The latter results have been further classified in terms of amplitude and spectral distributions. The overall results include: (i)...
Topics: DTIC Archive, Szuszczewicz,E P, NAVAL RESEARCH LAB WASHINGTON DC, *PLASMAS(PHYSICS), *ELECTRON...
4,4'-Diazidodiphenylpolyester was synthesized by ozonolysis of 4,4'-bis (acetylamino) benzoin. By an analogous series of steps a monoazido analog was synthesized. A substituted cubyl polyester was synthesized via a multistep synthesis. A novel and versatile method was discovered for the synthesis of vicinal diazides. Structural and mechanistic implications derived from this work are discussed.
Topics: DTIC Archive, Moriarty, Robert M, ILLINOIS UNIV AT CHICAGO CIRCLE DEPT OF CHEMISTRY, *POLYMERS,...
Polymorphism often occurs in energetic materials. Differences in the forms range from conformational changes in the molecule from one system to another, to conformational equivalents packing in different manners. These differences, whether drastic or subtle, can lead to substantial alterations in stability and performance. The authors recently reported on the crystal structures of five polymorphs of picryl bromide (a common energetic precursor): the previously identified alpha and beta forms,...
Topics: DTIC Archive, HOWARD UNIV WASHINGTON DC DEPT OF CHEMISTRY, *ENERGETIC PROPERTIES, *POLYMORPHISM,...
