Most polymers exiting polymerization reactors contain residual monomers, dimers, solvents, and other volatile impurities that must be removed. Depending on the reactor system, the polymer can be a melt, fine particles, or a suspension such as a latex emulsion. This state of the product will dictate the purification or devolatilization process to be utilized. Twin or vented screw extruders can be used to devolatilize melts. Purge towers with steam or nitrogen are convenient devolatilizers for powdered products; and typically, steam stripping is used to remove volatile hydrocarbons from latex emulsions. The Center has measured the basic diffusivity and phase equilibrium relationships required for the design of these various devolatilization or purification processes. Not only does the Center have the capability to experimentally measure these required physical properties, but also extensive correlative and predictive techniques have been developed so that equilibrium and mass transfer behavior over a broad range of concentration, temperature and pressure can be estimated from a few experimental data points. In some cases, the required properties can even be estimated without any experimental measurements. In addition, the Center has been involved in the modeling of the various devolatilization processing such as purge towers and steamed stripping of emulsions. For specialty high purity purification requirements, the Center has unique supercritical extraction capabilities.