A Generalized Model for Swelling-Controlled Release Systems

摘要: A generalized model has been developed for simultaneous transport of an active agent and organic penetrant in a planar glassy polymer matrix. The diffuses out the matrix undergoing macromolecular chain relaxation volume expansion due to absorption from environment into swelling behavior is characterized by stress-induced drift velocity term "v" corresponding so-called case-II velocity. change phenomenon assumed instantaneous. incorporates convective two species induced stress gradient. proposed phenomenological reduces number special cases depending on polymer-penetrant system behavior.