Density, speed of sound and viscosity measurements at (288.15, 293.15, 298.15, 303.15 and 308.15) K were carried out on several binary (water + polymer) and ternary (water + polymer (1) + polymer (2)) systems. Polymers were polyethylene glycol 600 (PEG600), polyethylene glycol 10000 (PEG10000), polypropylene glycol 400 (PPG400), polyethylene glycol dimethyl ether 250 (PEGDME250), and polyvinylpyrrolidone 10000 (PVP10000). The measured density and speed of sound data were used to determine the excess specific volume, isentropic compressibility, and isentropic compressibility increment of the investigated solutions as well as the apparent specific volume, limiting apparent specific volume, limiting apparent specific expansibility, apparent isentropic compressibility, and limiting apparent isentropic compressibility of each polymer in the aqueous solutions of 1 % and 3 % (w/w) other investigated polymers. The intrinsic viscosities for the investigated binary and ternary systems were calculated from the experimental viscosity data. Finally, the ability of polymer (1) in varying the volumetric, compressibility, and viscometric properties of polymer (2) in aqueous solutions was discussed on the basis of the polymer–water and polymer (1)–polymer (2) interactions.
