# Mechanism Study of Combustion Dynamics of GO@CL-20 Composite
## 4 Conclusions  
The TG-DSC and single-pulse shock tube experiments conducted in this study have yielded the distribution of core pyrolysis products for the GO@CL-20 complex. Additionally, CHEMKIN simulations were employed to obtain sensitivity analyses, reaction pathways, and flux distributions. These results provide a solid foundation for subsequent quantum chemical calculations and serve as valuable references for model construction. The following conclusions can be drawn from the obtained data:  
1. The thermal decomposition process of GO@CL-20 was investigated using thermogravimetric differential scanning calorimetry (TG-DSC). The results demonstrated that the addition of graphene oxide (GO) lowered the activation energy of the sample, thereby accelerating the thermal decomposition of the composite. Subsequently, single-pulse shock tube experiments were conducted to evaluate the ignition delay time distribution, providing detailed data on the pyrolysis product distribution of GO@CL-20. Analysis of the ignition delay time revealed that the incorporation of GO  
Figure 12: Reaction paths and fluxes of GO@CL-20.  
reduced the internal energy of the composite system, leading to decreased reactivity and extended ignition delay times. Notably, an important carbon-nitrogen molecule, C\({}_{2}\)N\({}_{2}\), was identified in the pyrolysis products, with its yield increasing progressively as the concentration of GO increased.
2. Mass transfer characteristics and sensitivity analysis of GO@CL-20 samples were performed using CHEMKIN software to preliminarily determine the pyrolysis reaction pathways. The results demonstrated that the introduction of graphene oxide (GO) significantly altered the thermal decomposition behavior of the entire system. Additionally, C\({}_{2}\)N\({}_{2}\) exhibited a notably high decomposition rate along this reaction pathway, findings which are in excellent agreement with experimental observations. Meanwhile, H\({}_{2}\)CNNO\({}_{2}\) played a crucial bridging role between the two macromolecules.
3. The fitting results obtained using the Kissinger and Ozawa equations show close agreement. Specifically, the average activation energy for the thermal decomposition of CL-20 is 209.98 kJ/mol. In comparison, the average activation energies of GC-2, GC-3, and GC-4 are lower than that of pure CL-20. Notably, the activation energy for the thermal decomposition of GC-4 is reduced by 34.60 kJ/mol. These findings indicate that the introduction of graphene oxide exerts a catalytic effect on the thermal decomposition of CL-20.  
Conceptualization, X.F. and X.A.; methodology, X.A.; software, X.B.; validation, R.H. and Z.G.; data curation, X.A.; writing--original draft preparation, X.A.; writing--review and editing, X.F. and Z.G.; visualization, X.A.; funding acquisition, Z.G. All authors have read and agreed to the published version of the manuscript. This research was funded by the National Natural Science Foundation of China (Grant No. 06101213). Not applicable. Not applicable. Not applicable. Data Availability Statement: The original contributions presented in the study are included in the article. Further inquiries can be directed to the corresponding author. Specially acknowledge to the Xi'an Institute of Modern Chemistry and Northwestern Polytechnical University for the experimental materials and equipment. The authors declare no conflicts of interest.