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    Wyświetlanie 1-9 z 9
    Tytuł:
    Less Sensitive Transition Metal Salts of the 5-Nitrotetrazolate Anion
    Autorzy:
    Klapötke, T. M.
    Sabaté, C. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/358686.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    transition metals (Ag, Cu)
    5-nitrotetrazolate anion
    primary explosives
    initial safety testing
    Opis:
    Transition metal (silver and copper) salts of the 5-nitrotetrazolate (NT) anion (1 and 2) have been synthesized and characterized by analytical and spectroscopic methods. Standard BAM tests revealed extremely high sensitivity values for these compounds. The combination with the ethylenediamine ligand in salts 3 and 4 decreases the sensitivities in comparison to salts 1 and 2 making for much less hazardous handling and rendering the synthesis of NT salts more accessible for up-scaling. Additionally, a copper ammonia adduct of the NT anion (5) was synthesized, which shows the particularity of being able to be initiated by a laser beam, thus, decreasing the risk of accidental initiation, which often accompanies the use of primary explosives.
    Źródło:
    Central European Journal of Energetic Materials; 2010, 7, 2; 161-173
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explosive Properties of 4,4’,5,5’-Tetranitro-2,2’-bi-1H-imidazole Dihydrate
    Autorzy:
    Lewczuk, R.
    Szala, M.
    Rećko, J.
    Cudziło, S.
    Klapötke, T. M.
    Trzciński, W. A.
    Szymańczyk, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358061.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    TNBI dihydrate
    NTO
    explosives
    detonation properties
    thermal analysis
    Opis:
    This paper reports measured explosive properties of 4,4’,5,5’-tetranitro-2,2’-bi-1H-imidazole dihydrate (TNBI•2H2O). Non-isothermal kinetics analysis, calorimetric measurements, detonability tests, small-scale shock reactivity tests (SSRT), detonation velocity measurements and cylinder tests were performed. The results of the cylinder tests were used to determine the acceleration ability of TNBI•2H2O. Some experiments were conducted also with TNT, NTO, FOX-7 and RDX. Our experimental studies have shown that TNBI•2H2O is a thermodynamically stable compound, surpassing TNT with regard to its energetic and detonation parameters. The results of the SSRT indicate that this material has better performance in small charges than RDX, FOX-7 and NTO.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 3; 612-626
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    5,5'-Dinitrimino-3,3'-methylene-1H-1,2,4-bistriazole - a Metal Free Primary Explosive Combining Excellent Thermal Stability and High Performance
    Autorzy:
    Dippold, A. A.
    Feller, M.
    Klapötke, T. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/358456.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    energetic materials
    triazoles
    detonation parameter
    sensitivities
    Opis:
    The synthesis of 5,5´-dinitrimino-3,3'-methylene-1H-1,2,4-triazole (1) and selected nitrogen rich salts are presented. All compounds were fully characterized in terms of sensitivity and energetic properties. Besides a chemical characterization including multinuclear magnetic resonance study (1H, 13C, 14N) and vibrational analysis (IR, Raman), X-Ray diffraction was performed. Thermal stability was determined using differential scanning calorimetry. Detonation parameters were calculated using the EXPLO5.4 code based on CBS-4M computed heats of formation. The presented compound 5,5´-dinitrimino-3,3´-methylene- 1H-1,2,4-bistriazole shows excellent thermal stabilities in combination with high sensitivities and therefore is of interest for possible applications as metal free primary.
    Źródło:
    Central European Journal of Energetic Materials; 2011, 8, 4; 261-278
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Highly Energetic Salts of 3,6-Bishydrazino-1,2,4,5-tetrazine
    Autorzy:
    Klapötke, T. M.
    Preimesser, A.
    Schedlbauer, S.
    Stierstorfer, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358026.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    1,2,4,5-tetrazine
    energetic materials
    explosives
    sensitivities
    crystal structures
    Opis:
    3,6-Bishydrazino-1,2,4,5-tetrazine was synthesized as described by hydrazinolysis of 3,6-bis-(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine. Doubly protonated 1:1 and 1:2 salts of the highly energetic anions were synthesized. These are bishydrazinium-tetrazine dichloride dihydrate (1:2) (BHT-2HCl•2H2O) (2), bishydrazinium-tetrazine (5,5´-azotetrazolate) dihydrate (1:1) (BHT-ATz•2H2O) (3), bishydrazinium-tetrazine bis (3,5-dinitrotriazolate) dihydrate (1:2) (BHT(DNT)2•2H2O) (4), bishydrazinium-tetrazine bis (5-nitrotetrazolate) (1:2) (BHT(NT)2) (5), bishydrazinium-tetrazine (5,5´-bistetrazolate) dihydrate (1:1) (BHTBT•2H2O) (6), bishydrazinium-tetrazine bistetrazolylamine (1:1) (BHT-BTA) (7), bishydrazinium-tetrazine bis (3-amino-5-nitrotriazolate) (1:2) (BHT-(ANTA)2) (8) and bishydrazinium-tetrazine 4,4´,5,5´-tetranitro-2,2´-bisimidazolate (1:1) (9). Compounds 2-6 could be characterized by low temperature X-ray diffraction. All of the compounds were suffciently analyzed by 1H and {1H}13C and 14N NMR spectroscopy, elemental analysis (CHN), mass spectroscopy (FAB)) and vibrational spectroscopy (IR and Raman). The detonation parameters of the most promising candidates 5 and 9 in terms of energetic applications were calculated using the EXPLO5 V5.05 computer code. The energies of formation were calculated using CBS-4M electronic enthalpies and the atomization method. Furthermore, since all of the compounds are energetic materials, sensitivity tests towards impact (IS), friction (FS) and electrostatical discharge (ESD) were carried out. In addition their thermal stabilities were determined using a differential scanning calorimeter with a heating rate of 5 °C min-1.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 2; 151-170
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    5-Aminotetrazoles and Silver-based Primary Explosives
    Autorzy:
    Delalu, H.
    Karaghiosoff, K.
    Klapötke, T. M.
    Miró Sabaté, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/358016.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    silver
    nitrogen-heterocycles
    primary explosives
    BAM tests
    Opis:
    Several silver nitrate and perchlorate salts with 5-aminotetrazole-based ligands have been synthesized and characterized by elemental analysis, mass spectrometry, IR, Raman and multinuclear NMR spectroscopy. In addition, several of the new compounds were characterized by X-ray structure analysis. The energetic properties of the materials were assessed by differential scanning calorimetry (DSC) analysis in combination with standard impact and friction BAM tests. The compounds synthesized have good thermal stabilities above 225 C and in some instances the high sensitivities of the materials towards impact and friction make them fall under the category of primary explosives. Some of the compounds might present prospective use in initiation devices for civil and military applications.
    Źródło:
    Central European Journal of Energetic Materials; 2010, 7, 3; 197-216
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and Characterization of 1-(5-Azido-1H-1,2,4-triazol-3-yl)tetrazole
    Autorzy:
    Izsák, D.
    Klapötke, T. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/358367.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    energetic materials
    heterocycles
    triazoles
    tetrazoles
    azides
    Opis:
    This study presents the preparation of 1-(5-azido-1H-1,2,4-triazol-3yl)tetrazole (5) from commercially available chemicals in a five step synthesis. The energetic title compound was comprehensively characterized by various means, including vibrational (IR, Raman) and multinuclear (1H, 13C, 14N, 15N) NMR spectroscopy, mass spectrometry and differential scanning calorimetry. The sensitivities towards various outer stimuli (impact, friction) were determined according to BAM standards. The enthalpy of formation was calculated at the CBS-4M level of theory.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 3; 403-416
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrazinium 5-Aminotetrazolate: an Insensitive Energetic Material Containing 83.72% Nitrogen
    Autorzy:
    Fischer, N.
    Klapötke, T. M.
    Scheutzow, S.
    Stierstorfer, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358539.pdf
    Data publikacji:
    2008
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    hydrazines
    tetrazoles
    crystal structure
    energetic materials
    sensitivities
    Opis:
    Hydrazinium 5-aminotetrazolate (2) was synthesized via two facile routes. Both the reaction of 5-amino-1H-tetrazole (1) with hydrazine hydrate in aqueous solution and the reaction of 1 with diluted hydrazine solution in THF yield 2 in excellent purities and yields. 2 was characterized comprehensively by X-ray diffraction, IR, Raman and multinuclear NMR spectroscopy, mass spectrometry, elemental analysis and differential scanning calorimetry. The heat of formation was calculated (CMS-4M) using the atomization method to be 373 kJ mol-1. With this value and the X-ray density several detonation parameter (heats of explosion, detonation pressure, detonation velocity, explosion temperature) were calculated with the EXPLO5 computer software. An incredible high value (9516 m s-1) was obtained for the detonation velocity. Therefore experimentally tests to determine the velocity of detonation were performed. In addition the use of 2 in solid propellant compositions was calculated and tested in combination with oxidizers, e.g. ammonium dinitramide. Lastly the sensitivities towards impact, friction and electrostatic discharge were determined with the BAM drophammer, friction tester and an ESD machine.
    Źródło:
    Central European Journal of Energetic Materials; 2008, 5, 3-4; 3-18
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Adding 5-Aminotetrazole to a Modified U.S. ArmyTerephthalic Acid White Smoke Composition
    Autorzy:
    Glück, J.
    Klapötke, T. M.
    Shaw, A. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/358880.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    obscurants
    smokes
    battlefield
    smoke grenade
    Opis:
    Military visible obscuration compositions (obscurants, smokes) play an important role on today’s battlefield. For many years, the known toxicity or ageing problems of established formulations were commonly accepted since there was a lack of alternatives. Since the U.S. Army stopped producing the AN-M8 hexachloroethane (HC) smoke grenade, the M83 terephthalic acid (TA) smoke grenade has been used in its place. This cool-burning, less toxic, but also low efficiency white smoke formulation cannot compete with HC-based formulations in terms of obscuration performance. In this context, we have explored the use of 5-aminotetrazole (5-AT) as an additive and fuel in the known TA system. Remarkably, it has been found that sugar is not necessarily required in the formulations, which has implications for the future improvement of sublimation-condensation smoke compositions, including coloured smoke compositions. In small-scale tests, it was found that replacing sucrose with 5-AT in the formulations resulted in significantly improved smoke persistence.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 3; 489-500
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Study on the Heat Resistant Explosive 5,5’-Bis(2,4,6-trinitrophenyl)-2,2’-bi(1,3,4-oxadiazole) (TKX-55): the Jet Penetration Capability and Underwater Explosion Performance
    Autorzy:
    Klapötke, T. M.
    Witkowski, T. G.
    Wilk, Z.
    Hadzik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/951486.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    thermally stable explosive
    TKX-55
    shaped charge
    underwater detonation
    Opis:
    Ongoing research to find new explosives which are stable at high temperatures focuses on compounds which comply with the strict requirements which must be fulfilled in order for a compound to be of use in deep oil-well and gas drilling applications. Great efforts have been focused on the development of new, thermally stable explosives which are stable at even higher temperatures than hexanitrostilbene, and which also show superior performance. In the group of recently synthesized thermally stable explosives, 5,5’-bis(2,4,6-trinitrophenyl)-2,2’-bi(1,3,4-oxadiazole) (TKX-55) is one of the most promising prospective candidates for use in practical applications, due to its physicochemical properties as well as its convenient synthesis. Therefore, further investigation into the performance of TKX-55 in shaped charge applications was undertaken. This study was focused on the investigation of the jet penetration capability of conical shaped charges filled with TKX-55, in comparison with recently used other explosives. The kinetic energy of the jet depends on the brisance of the explosive which is used. In order to experimentally investigate the shattering effect of TKX-55, the Underwater Explosion Test was applied. Based on the collected data, the total energy, as the sum of the primary shock wave energy (the brisance) and the bubble gas energy (the heaving effect), was calculated.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 4; 821-837
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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