PRESSURE AND TEMPERATURE-DEPENDENCE OF GLASS-TRANSITION DYNAMICS IN A FRAGILE GLASS FORMER

被引：42
|
作者：
LI, G
KING, HE
OLIVER, WF
HERBST, CA
CUMMINS, HZ
机构：
[1] EXXON RES & ENGN CO,CORP RES SCI LABS,ANNANDALE,NJ 08801
[2] UNIV ARKANSAS,DEPT PHYS,FAYETTEVILLE,AR 72701
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 12期
关键词：
D O I：
10.1103/PhysRevLett.74.2280
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A depolarized light-scattering study of isopropylbenzene has been carried out at pressures from 1 bar to 7.6 kbar and at temperatures from 293 to 122 K. Both the supercooled and superpressed liquids show two-step relaxation processes. The faster relaxation in both cases can be described by a mode-coupling relaxation theory. Comparison of the pressure and temperature data indicate that density is not the only relevant parameter required to explain the evolution of the relaxation dynamics as the liquid-glass transition is approached. © 1995 The American Physical Society.
引用
收藏
页码：2280 / 2283
页数：4
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