含能增塑剂BuNENA和NG的热危险性研究

Study on thermal hazard of plasticizers BuNENA and NG

采用差示扫描量热实验分别研究了丁基硝氧乙基硝胺(BuNENA)和硝化甘油(NG)的热分解特性,获得热分解动力学参数,同时建立一种温度危险等级的确定方法。以改性双基推进剂浇铸工艺为例,得到了BuNENA和NG在改性双基推进剂浇铸工艺的温度危险等级。结果表明,BuNENA和NG的热分解动力学参数分别为(1)BuNENA:E a=124.15 kJ/mol,ln A=25.92 s^-1;(2)NG:E a=108.01 kJ/mol,ln A=22.16 s^-1。BuNENA的热稳定性优于NG;BuNENA和NG在改性双基推进剂浇铸工艺的温度危险等级分别为3级和8级。因此,BuNENA作为增塑剂能够显著降低改性双基推进剂浇铸工艺的温度危险性。

The thermal decomposition characteristic of N-butyl-N-(2-nitroxyethyl)nitramine(BuNENA)and Nitroglycerin(NG)were studied by differential scanning calorimetry,and the kinetics parameters of thermal decomposition were obtained.At the same time,the method for determining the temperature hazard grade was established.Taking the casting process of the modified double-based propellant as an example,the temperature hazard grade of BuNENA and NG in the casting process of the modified double-based propellant were obtained.The results show that the thermal decomposition kinetics parameters of BuNENA and NG are respectively(1)BuNENA:Ea=124.15 kJ/mol,lnA=25.92 s^-1;(2)NG:Ea=108.01 kJ/mol,lnA=22.16 s^-1,BuNENA has better thermal stability than NG;The temperature hazard grade of BuNENA and NG in modified double-based propellant are 3 and 8 respectively.Therefore,BuNENA as plasticizer can significantly reduce the temperature risk of the casting process of the modified double-based propellant.