Synthesis of ethylene diamine-based ferrocene terminated dendrimers and their application as burning rate catalysts
Ferrocene-based derivatives are widely used as ferrocene-based burning rate catalysts (BRCs) for ammonium perchlorate (AP)-based propellant. However, in long storage, small ferrocene-based derivatives migrate to the surface of the propellant, which results in changes in the designed burning parameters and finally causes unstable combustion. To retard the migration of ferrocene-based BRCs in the propellant and to increase the combustion of the solid propellant , zero to third generation ethylene diamine-based ferrocene terminated dendrimers ( 0G , 1G , 2G and 3G ) were synthesized. The synthesis of these dendrimers was confirmed by 1 H NMR and FT-IR spectroscopy. The electrochemical behavior of 0G , 1G , 2G and 3G was investigated by cyclic voltammetry (CV) and the burning rate catalytic activity of 0G , 1G , 2G and 3G on thermal disintegration of AP was examined by thermogravimetry (TG) and differential thermogravimetry (DTG) techniques. Anti-migration studies show that 1G , 2G and 3G exhibit improved anti-migration behavior in the AP-based propellant.
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