Novel fullerene-based stabilizer for scavenging nitroxide radicals and its behavior during thermal decomposition of nitrocellulose
2020
Zhao, Yang | Jin, Bo | Peng, Rufang | Ding, Ling | Zheng, Tian
The safe storage of double-based propellants is becoming increasingly challenging due to the extreme storage environment and update of weapon system. Therefore, to obtain high performance stabilizers, a novel multifunctional fullerene derivative, 4,11,15,30-tetramethophenyl fullereno[1,2:2′,3′]dihydrobenzofuran (C₆₀-DBTMP), was successfully designed and synthesized. The results of thermal stability indicated that the stability of C₆₀-DBTMP is better than that of traditional stabilizers (DPA, C2, AKII), and still maintain good performance at high temperature. Further thermal analysis showed that C₆₀-DBTMP interact with the decomposition products during the thermal decomposition of nitrocellulose, which changed the decomposition mechanism of nitrocellulose at the initial stage of thermal decomposition from self-accelerating catalytic model to non-autocatalytic reaction model. The stabilization mechanism was also investigated in detail, electron spin resonance (ESR) test showed that the nitroxide radicals scavenging efficiency of C₆₀-DBTMP is 73.4%, and effectively inhibit the acidity change caused by the thermal decomposition of nitrocellulose. Our study demonstrated the potential application of this multifunctional fullerene derivative as a stabilizer for propellants and provided a new strategy for designing high-performance stabilizers.
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