%0 Journal Article %A Chen, Teng %A Gou, Bingwang %A Hao, GaZi %A Gao, Han %A Xiao, Lei %A Ke, Xiang %A Guo, Shuangfeng %A Jiang, Wei %D 2018 %T Preparation, characterization of RDX/GAP nanocomposites, and study on the thermal decomposition behavior %U https://tandf.figshare.com/articles/journal_contribution/Preparation_characterization_of_RDX_GAP_nanocomposites_and_study_on_the_thermal_decomposition_behavior/7272491 %R 10.6084/m9.figshare.7272491.v1 %2 https://tandf.figshare.com/ndownloader/files/13426946 %K Critical temperature of thermal explosion %K kinetics %K RDX/GAP nanocomposites %K self-accelerating decomposition temperature %K thermodynamics %X
1, 3, 5-trinitro-1, 3, 5-triazinane/Glycidylazide polymer (RDX/GAP) energetic nanocomposites were fabricated via a facile sol-gel method. Morphologies and structure characterization of RDX/GAP energetic nanocomposites were studied by scanning electron microscopy (SEM), Raman and Fourier-transform infrared spectroscopy (FT-IR). SEM images indicated the sizes of RDX particles in RDX/GAP nanocomposites were in nanoscale. FT-IR spectra of RDX/GAP nanocomposites showed the conjunct characteristics of RDX and GAP, implying RDX particles were trapped in GAP gel matrix. Raman detection revealed the crystal form of RDX maintained original α-form during sol-gel process. The thermal kinetics and thermodynamics of RDX/GAP energetic nanocomposites were investigated by differential thermal analyzer (DTA) under various heating rates (5, 10, 15, and 20°C min−1). The kinetic and thermodynamic parameters of the energetic nanocomposites, such as activation energy (Ea), activation enthalpy (ΔH≠), activation entropy (ΔS≠), and activation Gibbs free energy of (ΔG≠) were obtained. The activation energies of RDX/GAP nanocomposites were lower than those of raw RDX and GAP-RDX mechanical mixtures, indicating RDX/GAP nanocomposites presented high thermolysis activities. The thermodynamic parameters presented a rising trend when the contents of RDX increase. The critical temperature of thermal explosion (Tb) and the self-accelerating decomposition temperature (TSADT) based on the activation energy were also obtained.
%I Taylor & Francis