Taking the combustion tear gas mixture as the research object, the system formula was optimized by adding a different mass fraction of 5-amino-1H-tetrazole(5AT). TG-DSC, a thermocouple, and a laser smoke test system were used to characterize the characteristic combustion parameters such as combustion temperature and velocity, as well as the end-point effects such as smoke concentration and particle size. Starink’s method, the Flynn–Wall–Ozawa method, and the Coats–Redfern method were used to evaluate the pyrolysis kinetic parameters of the samples. The results show that when the mass fraction of 5-amino-1H-tetrazole in the system is 10%, the maximum combustion temperature of the sample decreases by nearly 70 °C and the smoke concentration increases by 12.81%. The kinetic study also found that with a different mass fraction of 5-amino-1H-tetrazole in the system, the main reaction model of the mixed agent in the first, third, and fourth stages of pyrolysis changed significantly, but for the second stage of sample pyrolysis, the main reaction model (the A4 model) showed a high degree of consistency, which can be considered as the thermal diffusion stage of the tear agent capsicum oleoresin (OC) (the temperature range is 220~350 °C), which is highly consistent with the results of the TG-DSC analysis. It was also confirmed that OC’s thermal diffusion is mainly concentrated in this stage. The results of this study show that adding an appropriate amount of the combustible agent 5-amino-1H-tetrazole to the combustion tear gas mixture can improve its combustion performance and smoking performance, which provides an important, new idea for the development of a new generation of safe, efficient, and environmentally friendly tear gas mixtures.

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In order to study the thermal behavior of a capsicum oleoresin (OC) composite material used for burning tear bomb, the single component and the composite (KClO3+ lactose + OC) were tested by HS-STA-002 synchronous thermal analyzer. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) were performed at a heating rate of 10°C/min, the results show that the composites have good compatibility because the characteristic peaks of each component in the composites have little change compared with the relative characterization of the composites. The temperature range of the best volatilization effect of pure OC is between 250°C∼350°C; when the temperature is lower than 250°C, it is unfavorable to the thermal diffusion of OC; when the temperature is higher than 350°C, OC will undergo thermal decomposition. In the composite system, the temperature range of the best volatilization effect of OC is between 230°C∼330°C. Compared with the temperature range of the best volatilization effect of pure OC, the temperature range of OC is shifted to the left, but the range is smaller. All these findings can provide theoretical guidance for the formulation design and optimization of this kind of composites.