DYNAMICS OF LIQUID SULFUR AROUND THE EQUILIBRIUM POLYMERIZATION TRANSITION

被引：8

作者：

DESCOTES, L ^{[1
]}

BELLISSENT, R ^{[1
]}

PFEUTY, P ^{[1
]}

DIANOUX, AJ ^{[1
]}

机构：

[1] INST LAUE LANGEVIN,F-38042 GRENOBLE 9,FRANCE

来源：

PHYSICA A | 1993年 / 201卷 / 1-3期

关键词：

D O I：

10.1016/0378-4371(93)90436-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Liquid sulphur has been known since the beginning of this century to show at a temperature T(p) = 160-degrees-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-flight (TOF) inelastic neutron scattering as a function of temperature, below and above T(p). 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 T(p) followed by a ring-chain equilibrium.

引用

页码：381 / 385

页数：5