Dynamics of liquid sulphur around the equilibrium polymerization transition

L. Descôtes, R. Bellissent, P. Pfeuty and A.J. Dianoux

Physica A: Statistical Mechanics and its Applications, 1993, vol. 201, issue 1, 381-385

Abstract: Liquid sulphur has been known since the beginning of this century to show at a temperature Tp = 160°C a liquid-liquid transition assumed to consist of the polymerization of S8 rings into very long polymeric chains. A first neutron scattering study of the liquid local order enabled us to check this assumption at a microscopic level. Then, the vibrational density of states and local motions were studied by time-of-light (TOF) inelastic neutron scattering as a function of temperature, below and above Tp. Both the decrease of the modes characteristic of S8 rings and the evolution of the quasielastic scattering with temperature are consistent with the picture of a polymer transition at Tp followed by a ring-chain equilibrium.

Date: 1993
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:201:y:1993:i:1:p:381-385

DOI: 10.1016/0378-4371(93)90436-8

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