Explanation

It is referred to as double base propellant, code DB. propellant with nitrocellulose and nitroglycerin or other polyol nitrates as the main energy components. According to the chemical composition of nitrate ester! It can be divided into nitroglycerin propellant, nitrated diethylene glycol propellant, nitrated triethylene glycol propellant, trimethylolethane trinitrate propellant and other varieties. nitrocellulose is not easy to be processed and shaped under external force or external heat. It usually needs to be dissolved into a concentrated solution with solvent before it can be processed into various shapes and sizes of grain under certain external force and temperature I. propellant is made by dissolving nitrocellulose with nitroglycerin or other polyol nitrates and volatile solvents (such as acetone, ethyl acetate, etc.). It is called Kodak type propellant. The typical formula for processing is: mixed nitrocellulose 65%, nitroglycerin 29.5%, intermediate 2% Vaseline 3.5% "double base propellant, which is made by dissolving nitrocellulose with nitroglycerin or other polyol nitrates, is called Barristan propellant. Its typical formula is: nitrocellulose (nitrogen content 12%) 58.5%, nitroglycerin 30%, intermediate 3%, vaseline 1%, dinitrotoluene 7.5%. There are four processing methods of double base propellant, namely, press stretching method, rolling method, casting method and suspension method. Its energy and ablation are larger than single base propellant and smaller than composite gunpowder. It is commonly used as the charge for gun weapons and various small and medium-sized rockets. The propellant charge used for guns and weapons is called double base gun propellant, and its gunpowder strength is 930? 1176kJ/kg, used for the charge of the same body rocket engine, called double base propellant.

Classification