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Densities were measured with a high-pressure densitometer for two binary oligomeric systems of poly(ethylene glycol mono-4-octylphenyl ether) (PEGOPE) with 1-octanol or acetophenone at temperatures from 298.15K to 348.15K and pressures up to 50MPa. While the excess volumes are negative in (acetophenone+PEGOPE) over the entire composition range, those are found to change from positive to negative with...
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