The pressure dependence of the static permittivity of pentanol isomers

Abstract

The static permittivity and density of six isomers of pentanol have been measured at pressures up to 4000 kgf cm−2 over a temperature range from 20 to 50 °C. Kirkwood's g has been evaluated from the experimental results, and the relationship between its temperature and pressure dependence and the structure of the alkyl radical is discussed.

Effect of Pressure on the Static Relative Permittivities of 2-Methyl-1-alkanols at 298.15 K

“…( ∂ r ∂P ) T/ GPa -1 ) 17.83 -0.10(n -2) (5) (Danforth, 1931) and 2-methyl-1-butanol (Bennett et al, 1973) from the parameters given in Table 3. The values from eq 5 decrease linearly with n. There is a good agreement between the values from eq 4 and eq 5, except for 2-methyl-1-hexanol (n ) 6).…”

“…Pressure dependence of the static relative permittivities, r, for 2-methyl-1-propanol (b, this work; O,Danforth, 1931), 2-methyl-1-butanol (9, this work; 0,Bennett et al, 1973), 2-methyl-1-pentanol (2), and 2-methyl-1-hexanol(1)at 298.15 K. The smoothed full or broken curves are based on the values of r(0.1), A, and B given in Table 3A ln ( B + P/MPa B + 0.Effect of n in H(CH2)n-2CH(CH3)CH2OH on the static relative permittivities, r, under two pressures, 0.1 MPa (b) and 300 MPa (9), at 298.15 K. r (P, n) ) r (P, 2) -[2.380 + 1.00 × 10 -4 (P/MPa)](n -0.0950 ln[(107.3 + P/MPa)/107.4]…”

“…Only two studies on r values for 2-methyl-1-alkanols under high pressure have been reported: 2-methyl-1-propanol up to 1215.9 MPa at 273.15 K and 303.15 K (Danforth, 1931) and 2-methyl-1-butanol up to 392.3 MPa in the temperature range of 293.15 K to 323.15 K (Bennett et al, 1973). The r values obtained as a function of pressure in this work are fitted with the Tait-type equation.…”

“…The present work reports r values of 2-methyl-1-alkanols, H(CH 2 ) n-2 CH(CH 3 )CH 2 OH (n ) 3 to 6), from 2-methyl-1-propanol to 2-methyl-1-hexanol under high pressure up to 300 MPa at 298.15 K. Therefore n corresponds to the number of carbons in key 1-alkanols. Only two studies on r values for 2-methyl-1-alkanols under high pressure have been reported: 2-methyl-1-propanol up to 1215.9 MPa at 273.15 K and 303.15 K (Danforth, 1931) and 2-methyl-1-butanol up to 392.3 MPa in the temperature range of 293.15 K to 323.15 K (Bennett et al, 1973). The r values obtained as a function of pressure in this work are fitted with the Tait-type equation.…”

Effect of Pressure on the Static Relative Permittivities of Alkan-2-ols.

“…The literature density data at 0.1 MPa o(0.1), and the Tait parameters C' and B' are also included in Table 1. The Tait parameters for propan-2-ol are determined from density [9] and compression [10] data under high pressure, and those for pentan-2-ol and octan-2-ol were evaluated by using the densities at several pressures obtained from an empirical equation for the density [5,6]. Coupled with the o(0 .1) values and the Tait parameters, the density at P MPa o(P) can be calculated from the Tait equation:…”