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Nonisothermal decomposition kinetics, specific heat capacity, and adiabatic time-to-explosion of Zn(NH3)2(FOX-7)2

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Abstract

A new energetic zinc-FOX-7 complex, Zn(NH3)2(FOX-7)2 (FOX-7 = 1,1-diamino-2,2-dinitroethylene), was first synthesized. Thermal decomposition behavior and nonisothermal decomposition kinetics of Zn(NH3)2(FOX-7)2 were studied with DSC and TG/DTG methods. The kinetic equation obtained is \( \frac{{{\text{d}}\alpha }}{{{\text{d}}T}} = \frac{{10^{13.99} }}{\beta }4(1 - \alpha )[ - \ln (1 - \alpha )]^{{{3 \mathord{\left/ {\vphantom {3 4}} \right. \kern-0pt} 4}}} \exp ( - 1.448 \times 10^{5} /RT) \). The self-accelerating decomposition temperature (T SADT) and critical temperature of thermal explosion (T b) are 183.2 and 195.8 °C, respectively. The specific-heat capacity of Zn(NH3)2(FOX-7)2 was determined with a micro-DSC method, and the molar-heat capacity is 454.6 J mol−1 K−1 at 298.15 K. Adiabatic time-to-explosion was also estimated to be about 20 s. The thermal stability of Zn(NH3)2(FOX-7)2 is good and higher than that of analogous Cu(NH3)2(FOX-7)2.

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Acknowledgements

This study received financial assistance from the National Natural Science Foundation of China (No. 21241003 and No. 20803058) and the Education Committee Foundation of Shaanxi Province (No. 2013JK0697).

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Authors and Affiliations

  1. College of Chemical Engineering, Northwest University, Xi’an, 710069, People’s Republic of China

    Yu Zhang, Hao Wu, Kang-Zhen Xu, Qian-Qian Qiu & Ji-Rong Song

  2. Xi’an Modern Chemistry Research Institute, Xi’an, 710065, People’s Republic of China

    Ting An & Feng-Qi Zhao

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  1. Yu Zhang
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  2. Hao Wu
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Correspondence to Kang-Zhen Xu.

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Zhang, Y., Wu, H., Xu, KZ. et al. Nonisothermal decomposition kinetics, specific heat capacity, and adiabatic time-to-explosion of Zn(NH3)2(FOX-7)2 . J Therm Anal Calorim 116, 817–823 (2014). https://doi.org/10.1007/s10973-013-3589-y

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  • DOI: https://doi.org/10.1007/s10973-013-3589-y

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