Densities and Dielectric Permittivities of Four Polyhydric Alcohols

Abstract

The densities of 2-methyl-2,4-pentanediol, 2,5-hexanediol, 1,7-heptanediol, and 1,2,6-hexanetriol were measured in the range 20 e t/°C e 70. The dielectric permittivities of the same polyhydric alcohols were determined at 1 MHz between 10 and 200°C. The results were compared with literature data.

Densities and Dielectric Permittivities of Three Butanediols and Their Solutions with 10 mol % Water

“…In both cited works the distillation of samples before investigation was used. The dielectric constant of 1,3-butanediol determined at 10.3 °C by McDuffie and Litovitz (1962) is greater than ours by 4% as in the case of other polyhydric alcohols (Grineva et al, 1996). McDuffie and Litovitz (1962) boiled the samples under vacuum for 8 h to 10 h to dehydrate them and estimated their water contents on the order of 1 mass %.…”

Effect of temperature on the volumetric properties of dilute aqueous solutions of 1,2-hexanediol, 1,5-hexanediol, 1,6-hexanediol, and 2,5-hexanediol

“…Eventhough compiled experimental data for liquid hexanediols are scarce, they have been critically evaluated and the values show significant differences between them as well as high uncertainties in most cases [18,19].…”

Static Relative Permittivities of Polyhydric Alcohols under Pressures up to 300 MPa at 298.15 K

“…The refractive indices, n D , measured with an Abbe refractometer and the static relative permittivities, r (0.1), at 0.1 MPa and 298.15 K are listed in Table 1, along with those reported in the literature. [6][7][8][9][10][11][12][13][14][15] Uncertainty in n D is less than 0.0001. Our n D values for 1,2-ethanediol, 1,2- Zhuravlev,12 assuming that the relation r ) a + b/T is valid, where T is the temperature in K and a and b are the coefficients.…”