Analyses of the thermal characteristics and gaseous products of guanidine nitrate/basic copper nitrate mixtures using calorimetry with high resolution mass spectrometry
Analyses of the thermal characteristics and gaseous products of guanidine nitrate/basic copper nitrate mixtures using calorimetry with high resolution mass spectrometry
复制标题
DOI：
10.1016/j.jaap.2020.104918
复制
发表时间：
2020-10-01
影响因子：
6
通讯作者：
Miyake, Atsumi
中科院分区：
文献类型：
--
作者：
Izato, Yu-ichiro;Shiota, Kento;Miyake, Atsumi
本工作采用热重-差示扫描量热法结合高分辨率质谱法（TG/DSC/FIRMS）对硝酸胍（GN）与碱式硝酸铜（BCN）混合物组成的成熟产气剂进行了热解评估。该仪器同时测定质量变化和热流，并且还允许在精确的质量基础上评估放出的气体。使用裂解率校正来分析通过电子电离获得的MS数据。GN/BCN混合物在热解过程中会产生H2O、N2-、NO中心点、CO2和N2 O。利用FIRMS技术，成功地区分了CO2和N2 O、CO和N2-、NH3和OH中心点等质量相近的组分。热分析数据和气体演化的结果允许热解机制被提出。在该机理中，由BCN获得的铜（II）络合物催化分解由GN产生的NH3以产生N-2和H2O。因此，GN和BCN的混合物的热解提供了增加热量和气体输出的协同效应。
This work assessed the pyrolysis of a well-established gas generating agent consisting of a mixture of guanidine nitrate (GN) with basic copper nitrate (BCN), using thermogravimetry-differential scanning calorimetry in conjunction with high resolution mass spectrometry (TG/DSC/FIRMS). This instrumentation simultaneously determined mass changes and heat flow, and also permitted evaluation of evolved gases on an accurate mass basis. Fragmentation ratio correction was used to analyze the MS data acquired via electron ionization. GN/BCN mixtures were found to undergo pyrolysis to evolve H2O, N-2, NO center dot, CO2 and N2O. Using FIRMS, species having similar masses, such as CO2 and N2O, CO and N-2, and NH3 and OH center dot, were successfully distinguished. The thermal analysis data and the gas evolution results allowed a pyrolysis mechanism to be proposed. In this mechanism, a copper(II) complex obtained from the BCN catalytically decomposes NH3 generated from the GN to produce N-2 and H2O. The pyrolysis of a mixture of GN and BCN thus provides a synergistic effect that increases the heat and gas output.