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含能材料  2008 

二硝酰胺胍(GDN)的晶体结构和热行为(英)

Keywords: 物理化学,二硝酰胺铵(ADN),二硝酰胺胍(GDN),晶体结构,热行为

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Abstract:

利用二硝酰胺铵(ADN)和盐酸胍在水溶液中合成了二硝酰胺胍([(NH2)2CNH2]+N(NO2)2-,GDN),首次培养出了用于X射线衍射的无色透明单晶。GDN属三斜晶系,空间群为P-1,晶体结构参数为:a=0.8332(5)nm,b=0.9306(6)nm,c=0.9878(6)nm,α=84.659(11)°,β=69.213(12)°,γ=67.451(12)°,V=0.6605(7)nm3,Z=4,μ=0.159mm-1,F(000)=344,Dcalc=1.671g·cm-3。通过DSC和TG/DTG法研究了GDN的热行为,其中第三阶段为强烈的放热分解过程,分解反应的表观活化能和指前因子分别为118.75kJ·mol-1和1010.86s-1。GDN热爆炸的临界温度为164.09℃。GDN比ADN有更好的热稳定性。

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