Reducing the Rate of Plasticizer Leaching from Poly(vinyl chloride) Matrix

Resumo

Abstract—The effects that the protective coating based on azidized poly(vinyl chloride) has on the leaching kinetics of dioctyl phthalate from the host polymer matrix are evaluated. The barrier properties of the applied protective coatings vary with the stirring time of the coating mixture. We develop models for forecasting the effects that the stirring time has on the leaching kinetics at the first stage of leaching and for identifying the conditions initiating the second stage, which is characterized by slower leaching rates. The mechanism underlying dioctyl phthalate leaching from poly(vinyl chloride) films with protective coating is discussed.