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Preparation, nonisothermal decomposition kinetics, heat capacity, and safety parameters of TKX-50-based PBX

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Abstract

TKX-50-based PBX (PBX-T) is prepared by solution–water suspension method using dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50) as the explosive. The thermal behavior of PBX-T is investigated under a nonisothermal condition by using TG-DTG and DSC method. The kinetic parameters (E a = 167.98 kJ mol−1 and A = 1016.05 s−1) for the main thermal decomposition reaction of PBX-T are calculated from the analysis of DSC curves by differential method and integral method, and the nonisothermal kinetic equation of the exothermic process is \({\text{d}}\alpha /{\text{d}}T = \left( {10^{16.05} /2\beta } \right)5\left( {1 - \alpha } \right)\left[ { - \ln \left( {1 - \alpha } \right)} \right]^{3/5} \exp ( - 2.0204 \times 10^{4} /T)\), suggesting that the main exothermic decomposition reaction mechanism of PBX-T is classified as Avrami–Erofeev equation. The specific heat capacity (C p) of PBX-T is measured using continuous C p mode of C80 micro-calorimeter. Depending on the thermal decomposition parameters and Chinese Military Standards GJB 772A-97 method, the adiabatic time, self-accelerating decomposition temperature, sensitivities, and 5-second flash point on of PBX-T are obtained.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China

    Hu Niu, Shusen Chen, Shaohua Jin, Bingjun Li, Xin Li, Junfeng Wang, Fang Bao & Lijie Li

  2. Research Institute of Gansu Yinguang Chemical Industry Group, Baiyin, China

    Xiao Ma

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  1. Hu Niu
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  2. Shusen Chen
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  3. Shaohua Jin
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  4. Bingjun Li
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  5. Xin Li
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  7. Xiao Ma
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  9. Lijie Li
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Correspondence to Lijie Li.

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Niu, H., Chen, S., Jin, S. et al. Preparation, nonisothermal decomposition kinetics, heat capacity, and safety parameters of TKX-50-based PBX. J Therm Anal Calorim 131, 3193–3199 (2018). https://doi.org/10.1007/s10973-017-6750-1

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  • DOI: https://doi.org/10.1007/s10973-017-6750-1

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