The internal energy of combustion was measured and used to determine the enthalpy of formation. Thermal decomposition of ammonium nitrate request pdf. For metaloxides,nanofe 2 o 3, 1,2 nanocuo,3,4 nanonio,5 etc. The burning rate increased in the order, anpthffe 2 o 3 bamohmx propellants 2. Thermal decomposition of bamohmx propellants, propellants. Pdf high energy materials propellants explosives and. Three kinds of binders were tested to elucidate the role of binder on the burning rate of the propellants. Thermal decomposition of base bleed propellants 24 the objective of this work is to evaluate the kinetic parameters of thermal decomposition through thermal analysis of base bleed propellants, commercial and synthesized samples by applying two models friedman and ozawaflynn. Epx2r is based on rdx 1,3,5trinitro1,3,5triazinane bonded by the elastic matrix of the softened styrene butadiene binder. Catalysed propellants decomposed at lower temperatures than the control. Percent thermal decomposition of propellants containing lead salts was also higher. Volume 22, issue 2 april 1977 thermal decomposition of nitrocellulose propellants received 21 june 1976.
This unique book investigates the synthesis, kinetics, and thermal decomposition properties and processing of energyproducing materials used in propellants, explosives, pyrotechnic, and gasgenerating compositions. This unique book investigates the synthesis, kinetics, and thermal decomposition properties and processing of energyproducing materials used in propellants, explosives, pyrotechnic, and. The thermal decompositions of two kinds of nh 4clo 4 ap with different grain size were investigated by dta and tcftir coupling. Studies on thermal decomposition of doublebase propellants.
The book also goes on to discuss the combustion mechanisms of various types of energetic materials, propellants, and explosives, based on the heat transfer process in the combustion waves. An overview on properties, thermal decomposition, and. Providing several approaches to stability, safety, and controlled combustion of flammable substances, thermal decomposition and combustion of explosives and propellants is a multidimensional resource for graduate students, researchers and professionals interested in chemical kinetics, the combustion and synthesis of highenergy materials. Thermochemical aspects of combustion naminosuke kubota this third edition of the classic on the thermochemical aspects of the combustion of propellants and explosives is completely revised and updated and now includes a section on green propellants and offers an uptodate view of the thermochemical aspects of. Download thermal decomposition and combustion of explosives and propellants or read online books in pdf, epub, tuebl, and mobi format. May 23, 2012 kinetic mechanism on thermal degradation of a nitrate ester propellant propellants, explosives, pyrotechnics, vol. Comparing the values of the activation energy e a obtained from pure ap, then the presence of aluminum particles only modified the kinetics of the chemical event occurring at high temperature. Investigates the synthesis, kinetics and thermal decomposition properties and processing of energyproducing materials used in propellants, explosives, pyrotechnic and gasgenerating compositions. Kinetic mechanism on thermal degradation of a nitrate ester propellant propellants, explosives, pyrotechnics, vol. The activation energy of the decomposition of the burning surface of gap propellant, e s, is determined to be 87 kjmol. Thermal decomposition of rdx composite propellants. Introduction kinetic problems of decomposition of explosives and propellants. Much work has been done to study the catalytic effect of these inorganic salts on the thermal decomposition of ap and also on the combustion of the apbased propellants 7 and references within, 8.
The burning rate models are also presented as an aid to understanding the ratecontrolling steps of combustion processes, thus demonstrating the. The thermal decomposition behaviors of these propellants depended on the kind of catalyst used. Epx2r is a highperformance plastic explosive produced for different applications. The burning rate increased in the order, anpthffe 2 o 3 and. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Propellants, explosives, pyrotechnics 18,6268 1993 thermal decomposition of bamohmx propellants 2. To understand the rote of lead salts of organic acids in the combustion of double base rocket propellants, thermal decomposition behaviour of propellants was studied bydta andtg methods. The thermal decompositions of a doublebase propellant db, five triplebase propellants tb and nitroguanidine ngv were examined.
Thermal decomposition studies of catalysed double base. It presents the fundamental bases of the energetics of materials, deflagration and detonation, thermochemical process of decomposition and combustion, plus combustion wave structures. Thermal decomposition of nitrocellulose propellants. As a rule, investigators determine a he thermal decomposition rate at a given temperature more often it is a number of temperatures and extrapolate the generated experimental data to the temperature range for which the behavior of charges from this he should be estimated. Up to 600 lbshour for certain propellants p explosives, and pyrotechnics pep bulk high. Clearly structured, the first half of the book presents an introduction to pyrodynamics.
Thermal decomposition and combustion studies of catalyzed an. Both neat an and an containing various contaminants are examined, however quantitative kinetics results are not encompassed. Thermal decomposition of nitrocelluloses derived from wood and cotton. In addition, metallic nanoparticles such as nano fe,6 nano zn,7 nano cu,8. This site is like a library, use search box in the widget to get ebook that you want. Thermal behavior and decomposition mechanism of ammonium. Catalytic effect on thermal decomposition, combustion wave structure, and burning rate of adn is also discussed. The book also goes on to discuss the combustion mechanisms of various types of energetic materials, propellants, and explosives, based on the heat transfer. Mesoporous copper oxide as a new combustion catalyst for. Catalysts were added in the prepared oxidizer samples to envisage their effects on the thermal decomposition of oxidizer samples. The most frequently employed oxides as burning rate catalysts are iron oxide fe 2 o 3, copper oxide cuo, and copper chromite cuo cr 2 o 3. Preparation and characterization of a new highperformance. Thermal decomposition of propellants the tg and dta curves of the propellants used in this study are shown in figs. Kinetic data on such parameters as thermal decomposition and sublimation were obtained for these materials and used as a basis for the ten year life prediction.
A computerizing mixer plastograph was used for the production of epx2r. Rate constants were higher and energy of activation. Better understanding of the chemistry will allow these properties to be controlled more successfully than currently possible, improving performance, reliability and safety. The kinetic parameters were evaluated using the astm, kissinger, rogersmorris, freemancarroll and borchardtdaniels methods. The thermal decomposition of triplebase propellants. Heats of decomposition, combustion and explosion of nitrocelluloses derived from wood and cotton.
This third edition of the classic on the thermochemical aspects of the combustion of propellants and explosives is completely revised and updated and now includes a section on green propellants and offers an uptodate view of the thermochemical aspects of combustion and corresponding applications. The propellants containing mno 2 burned above 4 mpa, while those containing fe 2 o 3 burned above 0. A detailed overview on the physical and chemical properties, thermal decomposition, and combustion behavior of adn and adn based propellants has been discussed in this paper. It is proposed that the decomposition of ap crystal obeys the process of topochemistry and it is explained that there are two steps in the decomposition of the coarse grain size. To understand the role of lead salts of organic acids in the combustion of double. Furthermore, pa binder differs from the other two binders in the residue, which is about 20% at 500 c. Pdf thermal decomposition pathways in nitramine propellants. The thermal decomposition characteristics of rdx, binders, and rdx composite propellants were studied using thermal analytical techniques. The thermal decomposition of ammonium perchloratealuminum. Six propellant samples without and with catalyst were prepared in oxidizerfuel of ratio of 8020, and their thermal decomposition and burning rate studies were carried out. Explosives and propellants contain considerable chemical energy that can be converted into rapid expansion. Providing several approaches to stability, safety, and controlled combustion of flammable substances, thermal decomposition and combustion of explosives and propellants is a multidimensional resource for graduate students, researchers and professionals interested in chemical kinetics, the combustion and synthesis of highenergy materials, criminal forensics, and the field of explosives, powders, and solid rocket propellants. Highenergy materials are commonly used as military explosives and as advanced propellants.
Thermal decomposition studies of catalysed double base propellants haridwar singh and k r k rao explosives research and development laboratory, pashan, pune 411021, india ms received 31 january 1983. Propellants, explosives, pyrotechnics 7, 4045 1982 thermal decomposition of rdx composite propellants 2. In contrast to the simple burning of a fuel, explosives and propellants are selfcontained and do not need an external supply of oxygen via air. Description of the book thermal decomposition and combustion of explosives and propellants. Click download or read online button to get thermal decomposition and combustion of explosives and propellants book now. Thermal decomposition and combustion of explosives and. The kinetics of the thermal decomposition of nitrocellulose. Combustion of doublebase propellants combustion of ncng propellants burning rate characteristics combustion wave structure burning rate model model for heat feedback from the gas phase to the condensed phase burning rate calculated by a simplified gasphase model energetics of the gas phase and burning rate temperature sensitivity of burning rate combustion of nctmetn propellants burning. Thermal decomposition and combustion of explosives and propellants will be of interest to graduate students, researchers and professionals in industry interested in chemical kinetics and the combustion of energetic materials.
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