Densities, p, dynamic viscosities, n, refractive indexes, nD, and heat capacities, Cp, for the binary mixts. contg. four block-copolymers [poly(ethylene glycol)-poly(propylene glycol)- poly(ethylene glycol)] (Mn = 1100, Mn = 1900, Mn = 2000, and Mn = 2800) + DMSO were detd. at (298.15 and 313.15) K and at atm. pressure using an Anton Paar densimeter, a Schott- Gerate AVS viscometer, an Abbe refractometer, and a Perkin-Elmer differential scanning calorimeter. Vol. variations, DV, during mixing and deviations of the dynamic viscosities, Dn, were obtained at these temps. and are neg. for all mixts. Exptl. data were fitted to the Redlich-Kister equation, and the adjustable parameters and the std. deviations between exptl. and calcd. values were estd.
Densities, Viscosities, Refractive Indices, and Heat Capacities of Four Poly(ethylene glycol)-Poly(propylene glycol)-Poly(ethylene glycol)-block-Copolymers + Dimethyl Sulfoxide at (298.15 and 313.15) K and at Atmospheric Pressure
2009
Abstract
Densities, p, dynamic viscosities, n, refractive indexes, nD, and heat capacities, Cp, for the binary mixts. contg. four block-copolymers [poly(ethylene glycol)-poly(propylene glycol)- poly(ethylene glycol)] (Mn = 1100, Mn = 1900, Mn = 2000, and Mn = 2800) + DMSO were detd. at (298.15 and 313.15) K and at atm. pressure using an Anton Paar densimeter, a Schott- Gerate AVS viscometer, an Abbe refractometer, and a Perkin-Elmer differential scanning calorimeter. Vol. variations, DV, during mixing and deviations of the dynamic viscosities, Dn, were obtained at these temps. and are neg. for all mixts. Exptl. data were fitted to the Redlich-Kister equation, and the adjustable parameters and the std. deviations between exptl. and calcd. values were estd.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
