An efficient strontium-based combustion inhibitor of ammonium perchlorate with a 2D-MOF structure

In this study, a new strontium 2D-MOF, {[Sr(AFCA)(2)(H2O)(2)]center dot 2H(2)O}(n) (AFCA = 4-aminofurazan-3-carboxylic acid), was successfully prepared by slow evaporation at room temperature. Its structure was characterized by X-ray single-crystal diffractometry. DTA as an efficient thermal analysis method was used in this study to have a better understanding of the thermal decomposition of ammonium perchlorate (AP). The Kissinger and the Ozawa-Doyle methods were also applied to determine the apparent activation energy (E) and the pre-exponential factor (A) of AP thermal decomposition. After the addition of {[Sr(AFCA)(2)(H2O)(2)]center dot 2H(2)O}(n) in AP, there is an increase of 85.97 degrees C in the LTD stage of AP thermal decomposition and an insignificant decrease of 24.32 degrees C in the HTD stage. With the help of the TG-DSC-DTG method, we analyse the catalytic mechanism of AP in the LTD stage in detail. {[Sr(AFCA)(2)(H2O)(2)]center dot 2H(2)O}(n) can act as an efficient combustion inhibitor for AP thermal decomposition.

Automated summary

A new strontium 2D-MOF, {[Sr(AFCA)(2)(H2O)(2)]·2H(2)O}(n), was prepared and found to significantly affect the LTD stage of AP thermal decomposition, with a slight impact on the HTD stage. It acts as an efficient combustion inhibitor for AP thermal decomposition.