C systems, the tetrazole moiety has the highest nitrogen atom content, which outcomes in higher heat of formation and higher energetic functionality. Lately, a large quantity of nitrogen-rich, tetrazole derivatives were Decanoyl-L-carnitine custom synthesis reported [749]. Even though among these Bestatin Anti-infection systems TKX-50 appears to become the most promising, with its synthesis process being reported [80], a lot function needs to be accomplished to confirm the practical applicability of this compound. TKX-50 is characterized by great heat-resistance properties: its vital temperature of thermal explosion is 533.39 K [74]. It was shown that TKX-50 decomposes using the formation of N2 , H2 O, NH3 , N2 O, and NO. HTPB-based propellant formulations were produced having a iron hydroborate (BH-Fe) as a burning rate modifier had been studied [81,82]. The samples had precisely the same composition but differed in mass fraction of BH-Fe (Tables A3 and A4). Propellant formulations without having BH-Fe had been used as a reference. The operate focuses on describing the effect of BH-Fe on combustion properties (burning price and pressure exponent). BET and SEM analysis showed that microstructure of your tested BH-Fe particles has irregular shape and tends to disperse. Additionally, no cold cohesion was observed (for the microsized sample). This phenomenon appears during storage, handling, and manufacture (at space temp.) and leads to microsized clusters decreasing the particular surface. Density of propellant formulations which include aluminum particles is bigger than these which contain BH-Fe as an additive. It might be connected for the modest porosity of BH-Fe powders during the manufacture of propellant formulation. When it comes to combustion properties (burning rate and stress exponent), rising the mass fraction of BH-Fe leads to improve the burning rate (12 larger burning rate for 3 mass fraction with the BH-Fe replaced Al powder) and experimentally-determined specific impulse. Furthermore, the outcomes obtained indicate that though burning price is dependent upon the mass fraction of BH-Fe, the stress exponent will not alter a lot. Figure 11.Supplies 2021, 14,Fe powders through the manufacture of propellant formulation. With regards to combustion properties (burning rate and stress exponent), escalating the mass fraction of BH-Fe results in boost the burning price (12 higher burning rate for three mass fraction in the BH-Fe replaced Al powder) and experimentally-deter12 of 17 mined certain impulse. Additionally, the results obtained indicate that though burning price depends on the mass fraction of BH-Fe, the pressure exponent will not modify a lot. Figure 11.Figure 11. Combustion flame overview propellants with unique mass fraction of HIC at pressures Figure 11. Combustion flame overview propellants with different mass fraction of HIC at pressures 1, 4, and 7 MPa. Prime is sample BHF-1, second and third lines are samples BHF-2 and BHF-3, bottom 1, 4, and 7 MPa. Prime is sample BHF-1, second and third lines are samples BHF-2 and BHF-3, bottom is BHF-4. Reprinted with permission of Elsevier from [82]. is BHF-4. Reprinted with permission of Elsevier from [82].Effect of Al addition to composite-modified double based propellants around the heat of explosion, burning rate along with the combustion properties was reported [5]. Seven formulations with diverse Al/HMX content material have been prepared by a slurry-cast system. Heats of explosion, burning rates, combustion parameters and flame characterization were investigated. The minimum no cost energy approach (NASA-CEA) was applied to calcul.