Synthesis And Combustion Catalytic Activity Of Ferrocene Energetic Compounds

The combustion catalyst can change the solid propellant’s combustion rate significantly and it is an important functional component in solid propellants.Ferrocene derivatives are widely used to be combustion catalysts due to their excellent combustion catalytic activity,but they are easily volatilized and migrated during solidification and storage,It is the focus of researchers’ attention that further increasing the burning rate of ferrocene-based burn-rate catalysts and solving their problem of easy migration.In recent years,energetic compounds have become a hot topic for researchers at domestic and overseas,due to their unique properties such as high energy,high density,and high tension.In this paper,energetic compounds are linked together with ferrocene derivatives in order to build a new type of combustion catalysts with high energy,high combustion catalytic activity and strong anti-migration.The main contents are as follow:(1)Using nitrogen heterocycles with different nitrogen contents and ferrocene dicarbonyl chloride as materials,seventeen ferrocene energetic compounds of A and B types were synthesized and characterized.The thermal decomposition behavior of was analyzed by their TG curves and the results showed that the B-type compounds had higher thermal stability than the A-type.DSC technology was used to investigate the catalytic effect of seventeen compounds on the thermal decomposition of ammonium perchlorate(AP).The results showed that the catalytic effects of A and B compounds on AP were very different.Among them,the compounds A can combine the two-slow-step thermal decomposition process of AP into one step and the peak temperature is significantly advanceed.And AP’s own crystal transition peak has been obscured,but the decomposition process is slow and the exothermic range is large(about 200 to 300 ℃);The B-type has no obvious effect on crystalline conversion peak of AP,but it can combine the two-slow-step decomposition process of AP into one rapid decomposition process with a small exothermic range(about280 to 320 ℃).(2)The TG technique was used to study their thermal decomposition behavior and compared with the monomeric ferrocene energetic compounds.It was found that the stability of oligomers was generally higher than that of monomeric ferrocene energetic compounds.DSC was used to evaluate the catalytic effect of the three oligomers on thethermal decomposition of AP and compared with the corresponding monomer compounds.The results showed that the oligomers had better catalytic effects on AP than the monomer compounds.The ferrocene,the three oligomers,and the corresponding three monomer compounds were tested for their mobility.The results showed that the mobility of ferrocene was 45% for 42 days at 45 ℃;the mobility of the three monomer compounds was 2.3%,2.1%,2.5%,and the mobility of the three oligomers was almost 0.