Abstract
AbstractA crosslinked polyurethane foam has been used as the stationary phase in inverse gas chromatography to measure the solubility parameter (δ2) of the polymer at several temperatures (T) within the range 298–383 K. Values of δ2 = 29.5(MPa)1/2 at 298K and dδ2/dT = −0.06(MPa)1/2 K−1 were yielded. Linear decreases with temperature of the solubility parameters (δ1) of water, ethanol and methanol were obtained by calculation from relevant properties of the liquids. The results were used to assess the conditions for the polyurethane foam to act as a non‐interacting barrier against liquids of different polarities for which the criterion is that |δ1 − δ2| should be large. The findings highlight the need to consider both the nature of the liquid and the temperature regime.
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