It was experimentally found that 1,3,3-trinitroazetidine (TNAZ) can be used in the smokeless CMDB propellants by replacing DINA and NG. The energy, safety, combustion characteristics and thermal behavior of the TNAZ-CMDB propellants were studied in details. Experimental results showed that TNAZ can slightly improve the energy of the smokeless CMDB propellant, little affect the thermal stability of the propellant and decrease the sensitivity to impact and friction and the burning rates of the propellant at different pressures. The decomposition temperatures of the main components in TNAZ-CMDB propellants was obtained in the range of 180～235 ℃ at high pressure by PDSC, and TNAZ in the propellants was found to volatilize or sublimate in the temperature range of 70～180 ℃ at common pressure. The flame structures of TNAZ-CMDB propellants were little affected by the content of TNAZ.%对1,3,3-三硝基氮杂环丁烷(TNAZ)作为增塑剂的无烟CMDB推进剂的能量性能、安全性能、燃烧性能和热行为进行了研究,结果表明,TNAZ部分代替NG和DINA应用到无烟CMDB推进剂中,一定程度上提高了推进剂的能量,对推进剂的热稳定性影响不大,推进剂的机械感度和不同压力下推进剂的燃速均有所降低.微量量热实验研究发现,高压下TNAZ作为增塑剂的无烟CMDB推进剂的分解温度为180～235 ℃,其中TNAZ的分解温度大于220℃,而常压下该推进剂中的TNAZ在70～180℃时即挥发或升华.TNAZ的含量变化对TNAZ-CMDB推进剂火焰结构的影响不明显.
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