Combustion behavior of inorganic nitrates (KNO3, NaNO3, CsNO3, Ba(NO3)2, Sr(NO3)2, Pb(NO3)2, and NH4NO3) based energetic materials in wide range of pressure (0.1–18 MPa) was studied. Samples have the same binder and differ in combustion temperature due to a change of oxidizer excess ratio (α). It is shown that compositions differ in the burning rate, in its dependence on pressure. The extreme dependence of burning rate on α is established. The combustion temperature of the samples was experimentally determined.
The influence of metallic fuel (aluminum and aluminum‐magnesium alloy) on the burning rate of compositions based on inorganic nitrates (KNO3, NaNO3, CsNO3, Ba(NO3)2, Sr(NO3)2) was studied in a wide range of pressure (0.1–18 MPa). Samples have the same binder and differ in basic burning rate and flame temperature. Calculated flame temperature greatly depends on the Al and Al−Mg amount. The effect of metallic fuel on the burning rate of basic samples is complex. It depends not only on the properties of metals but also on the influence of cation nitrate on the burning rate of the basic sample and pressure combustion. Al and Al−Mg alloy have a different effect on the burning rate of the base samples. The efficiency of the metal on the combustion of base compositions is higher for low burning rate samples and samples with an increased oxidizer excess ratio. The lowest positive metal efficiency on the burning rate is observed for the fast‐burning KNO3 and CsNO3‐based compositions. At low pressure, Al−Mg alloy has a more significant effect than Al on the burning rate of the base samples. A slight increase in the burning rate for fast‐burning basic compositions is observed with the addition of a small amount of Al at atmospheric pressure. With a further rise of Al amount in the composition, the burning rate of the metalized sample becomes lower than the basic sample. With pressure growth, the metal effect on the burning rate increases due to a proportional change in the density of the resulting combustion products. As a result, metal combustion was more complete in the zone affecting the increase of burning rate.
A [3 + 2] cycloaddition reaction using dialkyne and diazide comonomers, both bearing explosophoric groups, to synthesize energetic polymers containing furazan and 1,2,3-triazole ring as well as nitramine group in the polymer chain have been described. The developed solvent- and catalyst-free approach is methodologically simple and effective, the comonomers used are easily available, and the resulting polymer does not need any purification. All this makes it a promising tool for the synthesis of energetic polymers. The protocol was utilized to generate multigram quantities of the target polymer, which has been comprehensively investigated. The resulting polymer was fully characterized by spectral and physico-chemical methods. Compatibility with energetic plasticizers, thermochemical characteristics, and combustion features indicate the prospects of this polymer as a binder base for energetic materials. The polymer of this study surpasses the benchmark energetic polymer, nitrocellulose (NC), in a number of properties.
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