Abstract
AbstractAddition of solvents may ease removal of small amounts of volatile residues from polymeric materials. Enhanced separation thus obtained is due to the influence of the solvent on the vaporpolymer–liquid equilibria and to its influence on the increase of the diffusion rate of the impurities. The problem has been examined through a mathematical model describing the behavior of the units employed in the purification. Examples of applications are illustrated in which prediction of the behavior of purification units are performed from small‐scale apparatus experiments.
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