| Abstract: | The change in retention mechanism at the glass transition temperature (Tg) of a polymer stationary phase from surface adsorption below Tg to bulk sorption above Tg allows for a separate determination of the magnitude of the solute interaction with both the bulk and the surface of the polymer. As a result, the limiting surface tension of the polymer-probe solution can be obtained from the corresponding partition coefficients. Examples of such determinations are given for several polymer-solute systems. |
