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含能材料  2001 

压力对某些含能材料液态热行为的影响

Keywords: 含能材料,热分解,常压差示扫描量热(DSC),高压差示扫描量热(PDSC)

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Abstract:

利用常压差示扫描量热(DSC)和高压差示扫描量热(PDSC)的方法研究了HMX、RDX、TEGDN、TMETN、NG、PDADN、DATH、GAP和TNT等含能材料液态热分解时的分解放热焓、分解峰温在不同压力下的变化规律。结果表明,压力可以抑制这些含能材料的升华(挥发),从而使其分解放热焓增大,分解峰温相应发生后移。压力可以使某些含能材料(如TMETN、TEGDN、PDADN、DATH等)液态分解时的自催化反应、气相产物之间的二次反应、主侧链竞争分解等一系列反应加强,并使其分解表观活化能发生变化。含叠氮基(—N3)的化合物在压力抑制其升华(挥发)后,分解峰温不再受压力影响,其热行为呈现较特殊的规律。

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