The investigation of the disappearance of an organic plasticizer from a solid fuel pellet has been undertaken with emphasis on determining the mechanism that most effectively describes this phenomena. Actual experimental data was taken and several mathematical models designed and solved in order to evaluate the physical parameters associated with the disappearance of the plasticizer. Values of the solid state molecular diffusivity and the molecular distribution coefficient for the gas-solid system theorized to be the most appropriate mechanism for plasticizer transfer are presented. (Author).

ADA051194. Project 2303.