Pressure-volume-temperature properties for binary oligomeric solutions of anisole with polyethylene glycol mono-laurate or polyethylene glycol mono-4-nonylphenyl ether at pressures up to 50MPa

Abstract

Experimental of P-V-T properties are measured for two binary systems containing anisole and one of oligomeric materials (polyethylene glycol mono-laurate, PEGML, and polyethylene glycol mono-4-nonylphenyl ether, PEGNPE) at temperatures ranging from 298.15K to 348.15K and pressures up to 50 MPa. Over the whole range of experimental conditions, the excess volumes of anisole + PEGML are negative (chemical-interaction dominant) and those of anisole + PEGNPE are positive (physical-interaction dominant). The Tait equation and the Redlich-Kister type model quantitatively represents the pressure-effect on the densities and the composition-effect on the excess volumes of the investigated systems, respectively. The Flory-Orwoll-Vrij (FOV) and the Schotte equations of state with or without using one binary interaction parameter calculate the specific volumes to RMSDs no greater than 0.04% and 0.11%, respectively.