Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Thermal decomposition kinetics and mechanism of CL 20/porous biomass carbon composites
| DOI: | 10.11809/bqzbgcxb2025.03.035 |
| Keywords: | CL 20; porous biomass carbon; interfacial catalytic; thermal behavior; mechanical sensitivity |
| Abstract: | Hexanitrohexaazaisowurtzitane/porous biomass carbon (CL 20/Pbc) composites were prepared by incorporating CL 20 into pbC through solvent evaporation method.The thermal decomposition behavior of the composite material was studied, and the kinetic parameters and mechanism functions were calculated using the Kissinger, Ozawa, and atava esták methods. Furthermore, the thermal decomposition mechanism of CL 20/pbC was analyzed using thermogravimetry mass spectrometry (TG MS) technology. It was found that the thermal decomposition of CL 20/pbC exhibited a reduction in both the peak temperature and activation energy by 2.4~4.4 ℃ and 14.06~14.73 kJ/mol, respectively, indicating a significant catalytic activity of pbC. The influence of pbC on the pyrolysis process of CL 20 was mainly due to the fact that NO2 generated from the breakdown of the N NO2 bonds could be adsorbed by the active sites on pbC. This continuous reduction in NO2 content further facilitated the breaking of N NO2 bonds, while the heat generated from the reaction contributed to the sustained decomposition of residual CL 20. Additionally, the safety performance of CL 20/pbC was evaluated, and the results showed that the interface interaction between CL 20 and pbC effectively reduced the mechanical sensitivity of CL 20. This work provides a reference for further application of CL 20 in solid propellants. |
| Issue: | Vol. 46 No. 3 (2025) |
| Published: | 2025-03-31 |