Synthesis and Properties of Two Energetic Salts Based on 1-Amino-2-nitroguanidine
نویسندگان
چکیده
Dois materiais energéticos, ricos em nitrogênio, baseados em 1-amino-2-nitroguanidina foram sintetizados. O comportamento térmico, propriedades termo-dinâmicas, estruturas eletrônicas e propriedades de detonação foram investigados. As curvas de calorimetria exploratória diferencial (DSC) mostram que 1-amino-2-nitroguanidina 2,4,5-trinitroimidazol (sal 1) pode ser usado como lançador de explosivos. Essas curvas permitem a determinação dos parâmetros termodinâmicos medidos como energia de ativação (Ek, sal 1, 282,1 kJ mol −1; sal 2, 116,2 kJ mol; Eo, sal 1, 275,0 kJ mol ; sal 2, 116,9 kJ mol), entropia de ativação (ΔS≠, sal 1, 395,7 J mol K; sal 2, 5,8 J mol K), entalpia de ativação (ΔH≠, sal 1, 278,7 kJ mol; sal 2, 113,1 kJ mol), energia livre de ativação (ΔG≠, sal 1, 117,6 kJ mol; sal 2, 110,9 kJ mol), calor de formação (ΔHf, sal 1, 264,7 kJ mol; sal 2, 487,6 kJ mol), temperatura crítica de explosão térmica (Tb, sal 1, 412,3 K; sal 2, 388,9 K) implicam que os sais sintetizados são seguros o suficiente durante o estoque ou uso; em vista da pressão de detonação (P, sal 1, 30,2 GPa; sal 2, 29,1 GPa) e da velocidade de detonação (D, sal 1, 8398 m s; sal 2, 8334 m s), acredita-se que os dois sais baseados em 1-amino-2-nitroguanidina possuem potencial para serem usados como materiais energéticos.
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