Equilibrium sorption of cyclohexane, n ‐hexane, carbon tetrachloride, n ‐pentane, benzene, trichlorotrifluoroethane, and methylene chloride in ethylene‐propylene copolymers at 10°, 23°, and 40°C. has been measured. These penetrants range from most soluble to least, in the order given. The propylene content of the copolymer has very little effect on equilibrium sorption, and the heats of dilution are small. The concentration dependence of the results is discussed in terms of the Flory‐Huggins equation. Correlation between sorption and solubility parameter is considered.
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H. K. Frensdorff (1964) studied this question.