Synthesis, Anti‐migration and Catalytic Effect of Ferrocene Azine Derivatives on the Thermal Decomposition of Ammonia Perchlorate

Abstract

Ferrocene burning rate catalyst (BRC) is a common catalyst to promote the combustion of composite solid propellant because of its high catalytic performance, but this kind of catalyst has the disadvantage of easy migration. Ammonia perchlorate (AP) is the main oxidant of composite solid propellant, and its thermal degradation behavior has an important impact on the combustion of propellant. New mononuclear and polynuclear ferroceneazine BRCs were synthesized, and their structures were characterized by UV-Vis, NMR, HRMS and IR spectra. The catalytic effects of these ferrocenylazines on the thermal degradation of AP were studied by DSC and TG. The results confirmed that the catalytic performance of azine without bisferrocenylpropane was inferior to that of Catocene (Cat), while the catalytic performance of azine with bisferrocenylpropane was equivalent to that of Cat. Anti-migration studies showed that both mononuclear ferroceneazines and Cat showed mobility, while polynuclear ferroceneazines did not migrate after long-term storage. Therefore, polynuclear ferroceneazine is a new kind of high-efficiency and non-migration BRC with application prospects.

Evaluation of Mono and Bimetallic Ferrocene-Based 1,2,3-Triazolyl Compounds as Burning Rate Catalysts for Solid Rocket Motor

“…The thermal stability of ferrocene-based 1,2,3-triazolyl compounds was assessed using the TG technique. As depicted in Figure S18, their weight loss began over 118 °C, except for compound 1-IL (91.9 °C), obtaining a considerable loss of mass at the temperatures of 292, 318, 271, and 275 °C for compounds 1 , 2 , 1-IL , and 2-IL , respectively, highlighting their considerable resistance to high temperatures, suggesting that they are of high thermal stability, as was mentioned by Zhang and Zhao. − …”

“…Several studies have focused on synthesizing combustion catalysts to improve CSPs’ burning rate and antimigration ability . These catalysts can be classified into four categories: transition metal oxides, , nanoparticles, − transition metal complexes, − and ferrocene (Fc)-based compounds. ,,− Transition metal oxides are inexpensive and simple to produce but have less worth in combustion. Nanoparticles have the advantage of being easier to transfer electrons and significantly reducing the decomposition temperature and activation energy for AP. , However, they are prone to aggregate and preferentially adsorbed on components during mixing, resulting in less dispersion of nano-Fe 2 O 3 particles and heat release of AP .…”