Thermodynamics of swelling of latex particles with two monomers

The partitioning of 2 monomers between the latex particle, monomer droplet, and aq. phases of an emulsion polymer latex are measured at satn. swelling of the latex particle phase (corresponding to intervals I and II of an emulsion polymn.). The monomer (Me acrylate, Bu acrylate, styrene) and polymer of these expts. correspond well to a simplified thermodn. theory of the satn. swelling of an emulsion polymer with 2 monomers, in which it is realized that the fraction of 1 monomer is equiv. in the latex particle and monomer droplet phases. Henry's law holds for monomers, both in the absence and in the presence of swollen latex particles. A simple empirical relation is developed whereby the concn. of 2 monomers at any ratio can be calcd. from the individual satn. concn. of the 2 monomers in the latex of interes