Fuel, Journal Year: 2024, Volume and Issue: 384, P. 133988 - 133988
Published: Dec. 9, 2024
Language: Английский
FirePhysChem, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Language: Английский
Citations
2
FirePhysChem, Journal Year: 2023, Volume and Issue: 4(2), P. 166 - 176
Published: Oct. 17, 2023
The current study presents a successful elaboration and characterization of an innovative energetic composite based on nitrocellulose nitrostarch (NC-NPS) dual-biopolymers, ammonium perchlorate (AP). A pre-establishment the optimal formulation AP@NC-NPS has been determined through theoretical estimation ballistic performance via CEA-NASA software. obtained composites were then fully characterized by FTIR, DSC, TGA analyses. IR-spectroscopy depicted presence all characteristic groups ester nitrates, revealing that incorporation AP did not alter chemical structure dual-biopolymers. thermal analysis demonstrated mutual catalytic effect between NC-NPS biopolymeric matrix supported decrease maximum degradation temperatures observed for decomposition stages after oxidizer. thermo-kinetic investigation, carried out using linear non-linear isoconversional approaches (TAS, VYA/CE) considerable reduction in activation energy values, highlighting, once again role improvement thermolysis process prepared composite.
Language: Английский
Citations
22
FirePhysChem, Journal Year: 2024, Volume and Issue: unknown
Published: July 1, 2024
In the present work, a study was carried out on effect of accelerated aging process thermal decomposition two composite solid propellants based ammonium perchlorate (AP) and hydroxy-terminated polybutadiene (HTPB). The first one (CP1) enriched with aluminum (Al) powders, while second (CP2) contained mixture lithium alanate (LiAlH4) as high-energy fuel additive. properties investigated propellant samples were determined using differential scanning calorimetry (DSC) thermogravimetry (TG) techniques. obtained results clearly demonstrated degradation aged compared to unaged ones, by shifting temperature peaks their main step lower temperatures decrease in DSC heat release. addition, residual unburnt increased, particularly for complex metal hydride-based propellant. Kinetic modeling phase, applying advanced isoconversional methods, revealed significant activation energy samples. Furthermore, three-dimensional diffusion model involved during phase changed random nucleation after 60 days time.
Language: Английский
Citations
7
FirePhysChem, Journal Year: 2024, Volume and Issue: 4(4), P. 327 - 332
Published: Dec. 1, 2024
The present study aims to elucidate the decomposition mechanism and gas evolution characteristics of a promising energy-rich carbamated microcrystalline cellulose nitrate (M3CN). molecular structure morphological starting carbamate (MCCC) its nitrated derivative were examined using FTIR SEM techniques. Thermal analysis TGA DSC revealed distinct behaviors for MCCC M3CN. exhibited endothermic linked degradation cellulosic structure. In contrast, an exothermic event was observed M3CN, attributed cleavage energetic groups within chains. Furthermore, hyphenated TG-FTIR confirmed that primary gaseous products emitted during pyrolysis M3CN included NO, N2O, NO2, CO2, H2O, CH4, HCHO, HCN, CHNO. findings this enhance our understanding in cellulose-based materials, providing significant reference forthcoming research explorations field.
Language: Английский
Citations
6
FirePhysChem, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 1, 2024
Language: Английский
Citations
6
Propellants Explosives Pyrotechnics, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 4, 2025
ABSTRACT Nitrocellulose (NC) is a highly energetic material used in various military and civilian applications. Nevertheless, the inherent instability of NC poses safety storage lifetimes challenges. To address this issue, traditional stabilizers have been to improve thermal stability NC. In study, we investigate effectiveness novel hybrid enhancing We prepared series samples supplemented with different stabilizers, including combinations Of 2‐nitrodiphenylamine (2‐NDPA) along cobalt (Co), nickel (Ni), manganese (Mn) ion‐exchanged sodium mordenite (NaMOR) zeolite. The underwent structural characterizations study their chemical compatibility structures. Furthermore, behavior were assessed using range analytical techniques, C80 microcalorimetry, thermogravimetric analysis (TGA), standardized tests like methyl violet (MV), vacuum stability, Bergmann–Junk (B&J) protocols. Experimental results confirmed good between stabilizer components matrix. Results from TGA microcalorimetry demonstrated that combining 2‐NDPA ion‐exchange NaMOR has synergistic effect. This combination not only enhances but also reduces its rate degradation compared alone. Additionally, accelerated aging emphasized systems, demonstrating ability scavenge nitroxide radicals mitigate harmful effects free produced during pyrolysis Thermo‐kinetic clearly indicated significant increase activation energy ( E ) pre‐exponential factor (log( A )) after addition designed stabilizers. Compared pristine NC, increased by substantial margin 37–74 kJ/mol, whereas log( rose 4.2–8.3 s −1 , indicating enhanced slower decomposition. research highlights potential as viable alternative for paving way development safer more effective nitrate ester‐based materials (NEEMs).
Language: Английский
Citations
0
FirePhysChem, Journal Year: 2025, Volume and Issue: unknown
Published: March 1, 2025
Language: Английский
Citations
0
Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: unknown, P. 111300 - 111300
Published: March 1, 2025
Language: Английский
Citations
0
Journal of Thermal Analysis and Calorimetry, Journal Year: 2025, Volume and Issue: unknown
Published: April 18, 2025
Language: Английский
Citations
0
Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180883 - 180883
Published: May 1, 2025
Language: Английский
Citations
0