The surface characteristics of carbon black were studied by scanning electron microscopy (SEM),laser particle size method and specific surface area test (BET).Adding different grades of carbon black to a nitramine modified double-base propellant,and tested its combustion performance and thermal decomposition performance,studied the effect of apparent performance of carbon black on propellant performance.Propellant properties were studied by target line method and differential scanning calorimetry (DSC).The result shown that the specific surface area of carbon black had the greatest influence on the burning rate of propellant.Compared to a formulation without carbon black,the addition of carbon black can greatly increase the burning rate of the propellant,reduced stress index and enhanced the catalytic effect of lead-copper composite catalyst.Carbon black with different specific surface area had different effects on propellant combustion performance.Among them,N1 carbon black was the most obvious.In the pressure range of 8MPa to 16MPa,the burning rate increased by about 4.8mm/s to 5.7mm/s.At the same time,the pressure index was lowered from 0.440 to 0.253.After the addition of carbon black,the two thermal decomposition peak temperature of the propellant both decreased to different degrees.
Wei Xiaolin, Zhou Jianhui, Li Hongyan, Shu Huiming, Zhao Guozhen
. Influence of surface characteristics of carbon black on combustion performance of modified double-base propellant[J]. New Chemical Materials, 2021
, 49(6)
: 98
-102
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.022
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