Effect of Various Formulations of Unsaturated Polyester Inhibitors on Mechanical, Thermal and Migration of Nitroglycerin in Double Base Rocket Propellants

Unsaturated polyesters are used as a inhibitor in double base rocket propellant grains. In this paper, the effect of chain length glycol, filler addition, varying amounts of styrene and adding compounds containing halogens on the gel time, the exothermic peak temperature, viscosity, tensile strength, percent elongation, strong bonding with the propellant, the amount nitroglycerin migration in unsaturated Polyester will be reviewed. The results showed that a significant improvement of nitroglycerin migration, gel time, exotherm peak temperature and mechanical properties when polyester chain length is reduced. It also reduces water absorption and nitroglycerin was observed with increasing concentrations of styrene monomer to 40 percent in polyester systems. The use of flame retardant materials such as EACGP also Showed improved resistance to flame and oxygen index polymer.