《Table 1Physicochemical and energetic properties of compounds 2, 3, and 4a-4e compared to RDX》

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《高热稳定和低感度多环类含能材料的设计与合成（英文）》

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Note:[a]molecular formula.[b]molecular weight.[c]nitrogen content.[d]OB for CaHbOcNd，1600（cab/2）/MW（based on CO）.[e]decomposition temperature (onset temperature at a heating rate of 10℃·min-1.[f]heat of formation.[g]density measured using a gas p

As shown in Table 1，the physicochemical and energetic properties of all as?prepared energetic com?pounds were determined by both calculations and measurements.Most of these energetic compounds（except compound 2）had high nitrogen contents ranging from 60.9%（4c）to 68.8%（4b），exceeding that of RDX.The CO?based oxygen balances of these compounds varied from-20.7 to-46.2 due to existence of only two oxygen atoms in energetic ion?ic parent structure.The thermal stabilities of neutral compound 3 and its energetic salts were investigated by differential scanning calorimetry（DSC）at heat?ing rate of 10℃·min-1.Except for energetic salt 4c（229℃），compound 3 and other salts all exhibited high thermostability values with decomposition tem?peratures above 260℃.These values were obvious?ly superior to those of common explosives RDX（204℃），CL?20（215℃），and TKX?50（221℃）.Especially，the decomposition temperature of salt 4e reached as high as 314℃，indicating its great poten?tial as heat?resistant explosive.