Temat: DNAN - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Studies on NTO-, FOX-7- and DNAN-based Melt Cast Formulations
Autorzy:: Mishra, V. S.
Vadali, S. R.
Bhagat, A. L.
Garg, R. K.
Kugaonkar, V. M.
Raman, S.
Sinha, R. K.
Asthana, S.
Tematy:: melt cast
DNAN
TNT
FOX-7
NTO
RDX/TNT
VOD
sensitivity; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/358500.pdf Link otwiera się w nowym oknie
Opis:: In the present paper, 2,4-dinitroanisole (DNAN) has been evaluated as a melt cast explosive in comparison to the widely used 2,4,6-trinitrotoluene (TNT). The detonation failure diameter of a bare DNAN charge is greater than 100 mm and about 44 mm with 1.5 mm steel confinement. Comparative studies of two sets of formulations were carried out. The first set comprised formulations containing 60% of NTO, FOX-7, HMX or RDX and 40% of DNAN or TNT. The second set comprised formulations containing 30% of NTO, FOX-7, TATB or RDX and 70% of DNAN or TNT. The studies were mainly concentrated on characterization of the formulations, which included determination of the sensitivity parameters and the velocity of detonation (VOD). The study confirmed that DNAN and DNAN-based formulations are relatively insensitive compared to TNT and the analogous TNT-based formulations respectively. The rate of the detonation reaction of DNAN is enhanced in the presence of the high energy ingredients RDX, HMX, FOX-7 and NTO to varying degrees. The VODs of the FOX-7/TNT and RDX/TNT formulations match closely with the proportions of FOX-7 and RDX under study. The VOD and shock sensitivity of the FOX-7/DNAN formulations decrease rapidly compared to the RDX/DNAN formulations, with increases in the proportion of FOX-7 or RDX. The combinations of NTO with TNT, and NTO with DNAN, are more shock insensitive than TNT or DNAN alone. NTO-based compositions are more insensitive than FOX-7-based compositions.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Oxidant-Accelerated Polymerization of Dopamine for Coating DNAN with Enhanced Toughness
Autorzy:: Li, Jinshan
Xiao, Chun
Liu, Guoqiang
Duan, Shuyi
Zheng, Baohui
Zhu, Qing
Tematy:: insensitive munitions
2,4-dinitroanisole
DNAN
polydopamine
toughness fracture
mechanical properties; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/59115324.pdf Link otwiera się w nowym oknie
Opis:: Due to the significantly reduced toxicity and shock sensitivity compared to TNT, DNAN is getting more and more attention in the study of insensitive munitions. However, the brittleness problem of DNAN limits its wide application. Inspired by mussels, DNAN particles with a thin and uniform coating based on the self-polymerization of dopamine were prepared by an oxidant-accelerated method in this work. XRD patterns indicated that the DNAN polymorph did not change during the coating process. FT-IR and XPS spectra manifested that the PDA was successfully distributed on the crystal surface. The results of TG-DSC analysis demonstrated that the mass ratio of PDA coating was as low as 1.71%. Meanwhile, Brazilian disk splitting test showed that the tensile strength, tensile strain, and fracture energy of DNAN@PDA cylinder were 16.1%, 32.0% and 53.0% higher than those of pure DNAN cylinder, respectively. The morphology of fracture surface after tensile test indicated that toughness fracture occurred in DNAN@PDA cylinder, while remarkable brittle fracture occurred in pure DNAN cylinder. The surface modification method could enhance the toughness of DNANbased explosives, and the fast fabrication of DNAN@PDA particles on a large scale could satisfy the application demands of insensitive munitions.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Review of the Essential Characteristics of 2,4-Dinitroanisole
Autorzy:: Meng, Jun-jiong
Zhou, Lin
Miao, Fei-chao
Tematy:: 2,4-dinitroanisole
DNAN
binary eutectic mixture
irreversible expansion
physical properties
crystal transformation; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/59115391.pdf Link otwiera się w nowym oknie
Opis:: With the development of weapons and ammunition to achieve more powerful and safer functional systems, 2,4-dinitroanisole (DNAN), used as an insensitive melt-cast matrix explosive, has received widespread attention. Various countries have conducted significant research and developed a series of DNAN-based explosive formulations in recent years. However, some inherent limitations of DNAN have enormously restricted its comprehensive application in weapons. In this paper, the progress of DNAN research in recent years is systematically reviewed from the aspects of its essential characteristics, such as physical properties (melting point, shrinkage, irreversible expansion, solubility, and mechanical properties), sensitivity and safety, stability, compatibility, and oxygen balance and energy. The advantages and disadvantages of DNAN are analyzed, and methods to solve these limitations are described. Furthermore, several important directions to be studied in future research are highlighted, including the study of DNAN binary eutectic mixtures mechanisms, control of crystal transformation, and improvements in mechanical properties.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Rheological Properties of DNAN/HMX Melt-cast Explosives : Maximum Packing Density Calculation and Modified Viscosity Model
Autorzy:: Meng, Jun-jiong
Luo, Yi-ming
Wang, Wei
Jiang, Qiu-li
Wang, Hong-xing
Miao, Fei-chao
Tematy:: 2,4-dinitroanisole
DNAN
grade ratio
maximum packing density
rheological properties
empirical model; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/59115417.pdf Link otwiera się w nowym oknie
Opis:: The study of suspensions with high solid content and low viscosity has become a very active topic for melt-cast explosives, for both research and industry. Previous studies have described how the viscosity of high-solid-content suspensions can be decreased by optimizing the grade ratio, that is, increasing the particle packing density. This paper numerically simulates the maximum packing density (Φm) for different grade ratios at which the suspension viscosity approaches infinity, using the overlapping discrete element cluster method. According to this method, the shape of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) particles was modeled as a group of overlapping, rigidly connected hard spheres. The results showed that the numerical simulation value can be used as the real value of Φm for any grade ratio in engineering applications. The rheological properties of 2,4-dinitroanisole (DNAN)/HMX suspensions with various grade ratios of three HMX samples with different d50 values were investigated using a rotational viscometer over a range of mass solids content (ϕ = 20-75 wt.%) in the shear rate range of 0.1-100 s⁻¹. An empirical model incorporating the reduced solid content (Φ, equal to ϕ divided by Φm) and shear rate (γ) was modified to predict the relative viscosity of DNAN/HMX suspensions. This modified model has a strong correlation with the experimental data and can be used to accurately predict the viscosity of DNAN/HMX suspensions. In addition, the applicability of different classical models to DNAN/HMX suspensions is discussed.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Topliwe mieszaniny wybuchowe z trinitrotoluenem i dinitroanizolem : porównanie właściwości
Melt-pour explosives with trinitrotoluene and dinitroanisole : a comparison of properties
Autorzy:: Cudziło, S.
Trzciński, W. A.
Dyjak, S.
Nita, M.
Tematy:: kompozycje topliwe
TNT
DNAN
wrażliwość
parametry detonacyjne
melt-pour composites
2,4-dinitroanisole
sensitivity
performance; Pokaż więcej
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Powiązania:: https://bibliotekanauki.pl/articles/209413.pdf Link otwiera się w nowym oknie
Opis:: Porównano wrażliwość na bodźce mechaniczne i termiczne oraz wyznaczono niektóre parametry detonacyjne 2,4-dinitroanizolu (DNAN) i 2,4,6-trinitrotoluenu (TNT). Przygotowano kompozycje zawierające DNAN lub TNT w roli składników topliwych oraz 3-nitro-1,2,4-triazol-5-on (NTO) i heksogen (RDX). Przeprowadzono porównawczą analizę właściwości użytkowych tych kompozycji.
Some sensitivity and performance characteristics for pure 2,4-dinitroanisole (DNAN) and 2,4,6-trinitrotoluene (TNT) as well as for melt-pour composites containing DNAN or TNT with hexogen (RDX) and 3-nitro-1,2,4-triasole-5-on (NTO) were determined (under the same conditions) and compared.
Dostawca treści:: Biblioteka Nauki

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