Measurements of diffusion and solubility of five solvents in a polyacrylic polymer films formed from a latex emulsion were conducted at infinitely dilute solvent concentrations over a temperature range of 85-120°C. The solubility or distribution coefficient behavior of four of the five solvents were consistent with conventional behavior in that the logarithm of the distribution coefficient was a linear function of the reciprocal temperature. In contrast, only one of the solvents showed diffusional behavior which is consistent with existing theories for diffusion in polymer-solvent systems. It is concluded that the presence of more than one polymer phase and the possibility of phase changes with temperature and solvent concentration lead to complications which preclude the utilization of a single average diffusivity to describe mass transport in these multi-phase systems.