The dielectric constant of liquid sulfur

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Abstract
The static dielectric constant of liquid sulfur has been measured between 122 and 169 °C with a reproducibility of 0.03%. The dielectric constant decreases with temperature as the polymerization temperature (159 °C) is neared, then increases with temperature above the polymerization temperature. These new data were taken closer to the polymerization temperature than were the earlier data of Baur and Horsma [J. Chem. Phys. 78, 1670 (1974)]; the two data sets are, however, in good agreement. The qualitative behavior of the dielectric constant is explained by assuming an ideal solution of polymeric sulfur in unpolymerized sulfur, using a constant polarizability per atom for unpolymerized sulfur and another, constant, polarizability per atom for polymerized sulfur, together with the extent of polymerization as a function of temperature as calculated by Wheeler, Kennedy, and Pfeuty [Phys. Rev. Lett. 45, 1748 (1980)] from the n→0 model. However, there are differences between the data and the model.

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