Dielectric Properties of Solutions of a Binary Mixture Resorcinol/n-Dodecanol in Heptane

In previous publications we reported about the dielectric properties of mixtures of n-hexanol and some aromatic diols with mesitylenc [1] and n-hexanol or n-dodecanol mixed with some aliphatic diols and diluted with heptane [2], The present communicat ion deals with mixture of a long chain alcohol, n-dodecanol "D", with an aromatic diol "R" (resorcinol, 1,3-dihydroxy benzene). Heptane " H " was used as a nonpolar diluent. Static and dynamic dielectric properties of this system have been measured over the concentration range (total alcohol mole fraction) x = 0.1 — 1 at three temperatures. Since the results are closely similar, the 20 °C values only are reported here. The dihydric/monohydric ratio is fixed and equals 2i = 1/19. The static permittivity was determined at 2 M H z using a W T W dipolemeter with an uncertainty of 2%. The refractive index nD was measured with an Abbe refractometer. The dielectric loss e" was measured over a wide frequency range (10 M H z 3 THz). At frequencies between 100 M H z and 11 GHz, a swept frequency transmission spectrometer was used [3]. In the high frequency region, four spot frequencies (138, 238, 429 and 671 GHz) were used. The 138 G H z frequency was generated by a Hughes oscillator [4], the other three frequencies were delivered by a Laser system [5, 6], The values are uncertain to about 5%. The density and viscosity were measured by a pycnometer and capillary viscometer, respectively.