A Brillouin light scattering study of the λ transition in liquid sulphur

The dynamics of liquid sulphur have been investigated in the temperature region corresponding to the so-called λ transition by means of Brillouin light scattering. Results of this work, together with ultrasonic spectroscopy and inelastic X-ray scattering results in literature, indicate that the main structural relaxation is slightly affected by the transition and suggest that the dramatic increase of shear viscosity is related to the onset of a low-frequency additional relaxation. Such a feature is commonly found in rubber-like materials and can be related to the polymerization of sulphur molecules across the transition.

[1]  M. Mezouar,et al.  Rubberlike dynamics in sulphur above the lambda-transition temperature. , 2005, Physical review letters.

[2]  W. B. Payne,et al.  Physical properties of sulfur near the polymerization transition. , 2004, The Journal of chemical physics.

[3]  S. Yannopoulos,et al.  Probing the sulfur polymerization transition in situ with Raman spectroscopy , 2003 .

[4]  R. Steudel.  Liquid Sulfur Liquid Sulfur , 2003 .

[5]  B. Eckert,et al.  Molecular Spectra of Sulfur Molecules and Solid Sulfur Allotropes , 2003 .

[6]  P. Taylor,et al.  Power law in properties of sulfur near the polymerization transition , 2001 .

[7]  M. Grimsditch,et al.  λ Transition in Liquid Sulfur Studied by Brillouin Scattering , 1996 .

[8]  S. Hosokawa,et al.  Optical absorption spectra of liquid sulphur over a wide absorption range , 1994 .

[9]  A. Caplin,et al.  Refractive index of molten sulphur , 1985 .

[10]  J. Koh,et al.  Polymer content of sulfur quenched rapidly from the melt , 1970 .

[11]  A. Tobolsky,et al.  The glass transition temperature of polymeric sulphur , 1963 .

[12]  W. Derbyshire,et al.  Lengths of polymer chains in liquid sulphur , 1963 .

[13]  M. Huggins.  Viscoelastic Properties of Polymers. , 1961 .

[14]  E. D. West.  The Heat Capacity of Sulfur from 25 to 450°, the Heats and Temperatures of Transition and Fusion1,2 , 1959 .

[15]  G. Fraenkel,et al.  Paramagnetic Resonance of Liquid Sulfur: Determination of Molecular Properties1 , 1956 .

[16]  R. Fanelli,et al.  The Viscosity of Sulfur1 , 1943 .

[17]  Alex. Mitchell Kellas,et al.  LXXXIII.—The determination of the molecular complexity of liquid sulphur , 1918 .