A New Energetic Material-Tetrazine Cobalt Salt: Synthesis, Thermal Decomposition Kinetics and Thermal Safety

doi:10.11944/j.issn.1000-0518.2017.08.160466

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (8): 928-935.DOI: 10.11944/j.issn.1000-0518.2017.08.160466

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A New Energetic Material-Tetrazine Cobalt Salt: Synthesis, Thermal Decomposition Kinetics and Thermal Safety

YANG Jin^a,LIU Qing^a,REN Yinghui^a^*(),ZHANG Xianbo^a,MA Haixia^a,XU Kangzhen^a,ZHAO Fengqi^b,HU Rongzu^b

^aSchool of Chemical Engineering Northwest University,Xi'an 710069,China
^b Science and Technology on Combustion and Explosion Laboratory,Xi'an Modern Chemistry Research Institute,Xi'an 710065,China

Received:2016-11-17 Accepted:2017-04-11 Published:2017-07-25 Online:2017-07-26
Contact: REN Yinghui
Supported by:
Supported by the National Defense Pre-Research Foundation of China(No.***3401)

Abstract

Abstract:

Tetrazine compounds have great applications in energetic materials field, which is attributed to its high energy, insensitivity, high burning rate, low pressure and good thermal stability properties. However, they have disadvantages of low density and thermal stability. To enhance the low properties of tetrazine compounds, a series of the tetrazine derivatives have attracted considerable attention. 3,6-Bis(1-H-1,2,3,4-tetrazole-5-amino)-1,2,4,5-tetrazine(BTATz), as a high-nitrogen energetic material, has good catalytic performance and application prospect. Therefore, we synthesized 1,2,4,5-tetrazine (s-tetrazine) cobalt salt with potassium salt of BTATz and cobalt nitrate in an aqueous solution. Its structure was characterized with elemental analysis, Fourier transform infrared spectrometer(FTIR) and inductively coupled plasma mass spectrometry(ICP-MS). Its chemical formula is Co(C₄H₂N₁₄)·4H₂O. The thermal behavior and thermal decomposition reaction kinetics were also investigated with differential scanning calorimetric(DSC) and thermal gravimetric-differential thermal gravimetric(TG-DTG) methods. The self-accelerating decomposition temperature(T_SADT), thermal ignition temperature(T_TIT), critical temperature of thermal explosion(T_b) and the adiabatic time-to-explosion(t_TIAD) were calculated as the important parameters to estimate the thermal safety, and the value were 509.69 K, 556.31 K, 524.93 K and 88.40 s, respectively. The adiabatic time-to-explosion is longer than those of Ca salt, Mg salt and Sr salt and the exothermic capacity is higher than that of its ligand BTATz. Therefore, it is expected to be a good combustion catalyst.

Key words: s-tetrazine, cobalt salt, thermal decomposition mechanism, thermal safety

YANG Jin, LIU Qing, REN Yinghui, ZHANG Xianbo, MA Haixia, XU Kangzhen, ZHAO Fengqi, HU Rongzu. A New Energetic Material-Tetrazine Cobalt Salt: Synthesis, Thermal Decomposition Kinetics and Thermal Safety[J]. Chinese Journal of Applied Chemistry, 2017, 34(8): 928-935.

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A New Energetic Material-Tetrazine Cobalt Salt: Synthesis, Thermal Decomposition Kinetics and Thermal Safety

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