PHYSICAL CHEMISTRY OF RESIN SOLUTIONS. PART V. THE SOLVENT - SOLUTE RELATIONSHIP OF RESINS IN MIXED SOLVENTS.

It has been found that if a resin is dissolved in a non-solvent by addition of a solubiliser, which itself may or may not be a solvent for the resin, the proportion of the sulabiliser necessary to confer complete solubility is the less, the higher the propor­tion of resin to the non-solvent. This is supposed to be true for all lyophilic solutes. On ultimate analysis it transpires that the above behaviour of resins has some similarity with liquids in their behaviour towards organic solvents. The solubility-curves are of the limited miscibility type for liquids but are highly unsymmetrical, and it is suggested that this is an intrinsic property of resins in particular nod lyophilic solutes in general, and is caused by the capacity of resin molecules for immense salvation.