Physical Properties of Sulfur Near the Polymerization Transition

Details Physical Properties of Sulfur Near the Polymerization Transition Physical Properties of Sulfur Near the Polymerization Transition

2004-05-03

arxiv.org/abs/physics/0405012v1

Physics

Chemical Physics

10 figures

Scientific paper

10.1063/1.1794031

Acoustical measurements, electron spin resonance, and Raman spectroscopy have been employed to probe sulfur over the temperature range 80 to 180 C, which includes the polymerization transition and the supercooled liquid state. Acoustical properties (sound velocity, absorption and impedance) have been studied with both longitudinal and transverse waves at frequencies between 500 kHz and 22 MHz. The results confirm that polymeric sulfur is a solution of long chain molecules in monomeric solvent, and that the polymerization transition is not a second order phase transition, as was proposed theoretically. Sulfur is a viscous liquid, but not viscoelastic, both below and above the polymerization transition temperature. It is shown that the classical Navier-Stokes theory is not applicable to the sound absorption in liquid sulfur in the highly viscous state.

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