Article
Thermodynamics
Makoto Kohga, Ryoto Togashi, Hironori Tsutiya, Yusuke Ota
Summary: This study investigated the burning characteristics of propellants supplemented with different amounts of Fe2O3. It was found that adding 1% Fe2O3 can increase the burning rate of propellants with different AP particle properties, and this effect is independent of pressure.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Applied
Hironori Tsuchiya, Ryoto Togashi, Makoto Kohga
Summary: This study investigates the influence of fine porous ammonium perchlorate (PAP) on the burning characteristics of an ammonium nitrate (AN)/ammonium perchlorate (AP) propellant and the effect of Fe2O3 as a catalyst. The results show that the porosity of PAP can increase the burning rate of AN/AP propellants, with minimal influence from pressure and ?.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2023)
Article
Engineering, Aerospace
Jesun Jang, Sejin Kwon
Summary: An optimized engine start procedure is crucial for the successful operation of a liquid rocket engine in launch vehicles. This study evaluates the use of a dihydroxyglyoxime (DHG)-based propellant for turbine starters, overcoming the shortcomings of conventional propellants. Motor tests show that the DHG-based propellant burns slower and exhibits a correlation between strand burn rate and burning rate factor. The burning characteristics of the DHG-based propellant provide valuable insights for internal ballistic analysis.
JOURNAL OF PROPULSION AND POWER
(2023)
Article
Chemistry, Applied
Dylan C. Purcell, Michael J. Hargather, Chelsey Z. Hargather
Summary: Seven formulations of ammonium perchlorate composite propellant (APCP) have been developed and characterized for their properties relevant to successful additive manufacturing. Several formulations have been found to be suitable for 3D printing applications based on their apparent viscosities and burn rates.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2023)
Article
Chemistry, Applied
Sunil Jain, Vijay K. Varma, Anil K. Mahajan, Vrushali H. Khire, Balasubramanian Kandasubramanian
Summary: The catalytic effect of copper tungsten oxide on the thermal decomposition of ammonium perchlorate was studied, showing an increase in propellant burning rate and improvement in performance parameters.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
Article
Materials Science, Multidisciplinary
Manel Nourine, Moulai Karim Boulkadid, Sabri Touidjine, Hamdane Akbi, Samir Belkhiri
Summary: This study investigates the thermal decomposition of surface modified ammonium perchlorate (AP) through kinetic modeling and the use of green iron oxide nitrocellulose nanocomposite (AP-NC-nFe(2)O(3)) produced via recurrent spray drying method (SDM). The thermal degradation of the samples was studied using differential scanning calorimetry (DSC) and thermogravimetric (TG) analysis, and the kinetics of the reactions were estimated using DSC combined with isoconversional methods. The results showed that the addition of nFe(2)O(3) and NC lowered the activation energies and reduced the critical ignition temperature of AP.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Cristian Valdebenito, Jose Gaete, Claudio Osorio, Yuvaraja Dibdalli, Angel Norambuena, Nathalie Lecaros, Cristian Carrasco, Hector Reyes, Gabriel Abarca, Cesar Morales-Verdejo
Summary: The study reported ferrocene-based 1,2,3-triazolyl compounds as potential burning rate catalysts with higher oxidative ability than traditional ferrocene, suitable for thermal decomposition of ammonium perchlorate and formation of nanoparticles. The complexes were characterized and analyzed to understand their catalytic behavior and mechanism of AP degradation at a nanoscale level.
Article
Biochemistry & Molecular Biology
Kinga Lysien, Sylwia Waskiewicz, Agnieszka Stolarczyk, Anna Mielanczyk, Roman Zakusylo, Tomasz Jarosz
Summary: The article compares rocket propellants with traditional and energetic binders, as well as perchlorate and green oxidising agents. The effects of individual substances on sensitivity parameters, combustion velocity, heats of combustion, thermal decomposition, and activation energy are studied using various experimental methods.
Article
Plant Sciences
Jianlong Liu, Jinzhu Wang, Zidong Wang, Min Li, Chenglin Liang, Yingjie Yang, Dingli Li, Ran Wang
Summary: It is found in this study that ammonium nitrate alleviates plant yellowing symptoms indirectly by increasing the content of NO. At the same time, both ammonium nitrate and NO also increase nitrogen accumulation in plants, improving their photosynthetic capacity and biomass accumulation. This study provides a new option for minimizing Fe deficiency by regulating the balance between nutrients.
Article
Chemistry, Inorganic & Nuclear
Vanessa Molina, Juan Luis Arroyo, Desmond MacLeod-Carey, Alvaro Munoz-Castroa, Cesar Morales-Verdejo
Summary: The [trans-Cu (mu-OH)(mu-dmpz)](6) complex can effectively reduce the decomposition temperature of ammonium perchlorate and increase the heat release as a burning rate catalyst. Compared to nano-metallic oxides, this copper compound shows superior performance in modifying the decomposition mechanism and accelerating the overall burning process.
Article
Engineering, Environmental
Sabrina Hanafi, Djalal Trache, Redha Meziani, Hani Boukciat, Abderrahmane Mezroua, Ahmed Fouzi Tarchoun, Mehdi Derradji
Summary: A novel energetic co-crystal composed of HNTO and AN was synthesized by solvent evaporation method, showing reduced sensitivity to friction and impact compared to its pure components. The co-crystal may serve as a potential oxidizer for composite solid propellant formulations.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Alexander A. Gromov, Elena M. Popenko, Alexey V. Sergienko, Konstantin V. Slyusarsky, Anton Yu. Nalivaiko, Dmitriy Yu. Ozherelkov, Kirill B. Larionov, Ella L. Dzidziguri
Summary: This study investigated the energetic properties of two types of aluminized solid propellants with inert and active binders modified by additives of different metal nanopowders. Significant improvement in energetic properties was observed by substituting an inert binder for an active one, although burning rate regulation became more complex. Certain metal nanopowders, such as Zn, Cu, and Mo, were found to have significant catalytic effects during combustion.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
Article
Chemistry, Applied
Joseph Kalman
Summary: This article discusses the impact of burning rate enhancers on the combustion process in solid rocket motors and suggests a method for classifying these modifiers to improve the scientific understanding of the matter.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2022)
Article
Polymer Science
Jinyi Liu, Haojie Yu, Li Wang, Tao Chen, Sergey Z. Vatsadze, Dingning Chen, Di Shen, Yu Wang
Summary: In this study, five Fc-terminated dendrimers were synthesized to improve the anti-migration properties of Fc-based burning rate catalysts (BRCs) in composite solid propellants (CSPs). The chemical structures, redox performance, catalytic effect, combustion performance, and mechanical properties of the synthesized dendrimers were investigated. The results showed that the Fc-terminated dendrimers exhibited good redox performance, positive effect on AP decomposition, excellent combustion catalytic performance, good mechanical properties, and higher anti-migration ability compared to Cat and Fc. This study highlights the potential of Fc-terminated dendrimers as anti-migration BRCs in CSPs.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jinyi Liu, Haojie Yu, Li Wang, Sergey Z. Vatsadze, Dingning Chen, Xudong Wu, Xiaodan Gong, Yu Wang
Summary: In this study, a series of Fc-functionalized GOs were fabricated and studied as BRCs in CSPs. The results showed that these compounds can accelerate AP decomposition, enhance the combustion performance of CSPs, and have good anti-migration ability.
MOLECULAR CATALYSIS
(2023)