Combustion performance of DNTF-CMDB propellant

The factors affecting burning rate and pressure exponent of DNTF-CMDB propellant were studied,including the content of DNTF,the different catalyst systems,the contains of carbon black and the granularity of DNTF.The results show that when the content of DNTF is 30%,the pressure exponent of propellant can be decreased to 0.37 by the composite catalyst system of energetic lead salt,aromatic cuprum salt and carbon black in 8～14MPa.When the content of DNTF is 50%,the pressure exponent of propellant can not be suppressed by the composite catalyst system of common Pb-Cu-CB(including energetic lead salt and aromatic lead salt and aromatic cuprum salt).The burningrate and pressure exponent of propellant will increase with the increasing content of carbon black.The burningrate of propellant can be affected by the granularity of DNTF obviously.The larger granularity of DNTF is,the higher burningrate is(53.19mm/s,16MPa),and pressure exponent increases.