纤维素甘油醚硝酸酯基模压可燃药筒的制备与性能

To improve the mechanical strength and plasticity of molded combustible cartridge cases, nitric acid ester of cellulose glycidyl ether (NGEC) (nitrogen content 12.3%) was used to replace part of nitrocellulose (NC)(nitrogen 13.0%) or lignocellulose in the formulation, and five combustible cartridge samples were prepared. And their mechanical and combustion performances at room temperature were tested. The results show that by replacing nitrocellulose with mass fraction of 15% and 30% NGEC, the tensile strength of combustible cartridge case increase by 33.8% and 35.2%, the fracture elongation decrease by 32.2% and 24.7%, the powder force drop by 3.2% and 10.7%, and the total burning time reduce by 59.8% and 56.8%, respectively. By replacing lignocellulose with 5% and 8% NGEC, the tensile strength of combustible cartridge case raise by 20.2% and 16.89%, the fracture elongation decrease by 48.1% and 47.2%, the powder force increase by 11.5% and 19.5%, and the total burning time decrease by 75.7% and 79.8%, respectively. Thus, NGEC can offer some degree of improvement to the tensile strength whereas it leads to a decrease of fracture elongation and burning-off time. Meanwhile, the mean combustion activity is raised obviously, and the burning rate is increased.