Investigation of Plasticizers Diffusion and its Effect on Mechanical Properties of Composite Solid Propellants

In this paper, various affecting parameters on plasticizer migration and mechanical properties of propellant in the composite solid propellants have been investigated. The plasticizer migration phenomenon in steady and un-steady state was also investigated by Fick law’s. Several methods to prevent liquid species migration in the composite solid propellants are described. A computer program based on the mathematical model of Fick’s second Law of diffusion was developed to perform the calculus from the concentration data obtained by experiments. The agreement between the simulated and experimental values obtained from current work validates this model.