Low Temperature Impact Strength of Nitrocellulose Based High Energy-Low Vulnerability Gun Propellant

To study the low temperature impact strength of nitrocellulose(NC)based high energy-low vulnerability gun propellant,four kinds of NC based high energy-low vulnerability gun propellants were prepared by changing the kind of NC,content of plasticizer ZSJ-X and FOX-7,and granularities of RDX and FOX-7in formulations.Their low temperature impact strength were measured by an electronic universal material testing machine.The results show that the low temperature impact strength of NC based high energy-low vulnerability gun propellant can be improved through reducing the nitrogen content of binder,enhancing the content of ZSJ-X,partly replacing RDX with FOX-7and reducing the granularity of RDX and FOX-7.When the formulation of NC based high energy-low vulnerability gun propellant is(mass fraction):NC of 37%;ZSJ-X of 25%;FOX-7(particle size of 1μm)of 13%;RDX(particle size of 5μm)of 33%,the low temperature impact strength is the best with the value of 7.75kJ/m2.