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

Abstract

In this study, a new strontium 2D-MOF, {[Sr(AFCA)₂(H₂O)₂]·2H₂O}_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]·2H₂O}_n in AP, there is an increase of 85.97 °C in the LTD stage of AP thermal decomposition and an insignificant decrease of 24.32 °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]·2H₂O}_n can act as an efficient combustion inhibitor for AP thermal decomposition.