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| - Pressure−Volume−Temperature Properties for Binary Oligomeric Solutions ofPoly(ethylene glycol) and Poly(ethylene glycol methyl ether) with Acetophenoneup to 50 MPa
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| - Pressure−volume−temperature (PVT) properties were measured with a high-pressure densitometer for theoligomeric solutions of acetophenone + poly(ethylene glycol)-200 (PEG-200) and acetophenone + poly(ethyleneglycol methyl ether)-350 (PEGME-350) at temperatures from 298.15 K to 348.15 K and pressures up to 50 MPa.While the excess volumes are positive in acetophenone + PEG-200 over the entire composition range, those arefound to change from positive to negative with increasing the mole fraction of the solvent in acetophenone +PEGME-350. The pressure effect on the liquid densities can be represented accurately by the Tait equation.Moreover, an empirical equation with two characteristic parameters correlates well the PVT data over the entireexperimental conditions for each binary system. The experimental specific volumes were also correlated with theFlory−Orwoll−Vrij (FOV) and the Schotte equations of state to within the experimental uncertainty.
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