NONEXPONENTIAL STRUCTURAL RELAXATION, ANOMALOUS LIGHT-SCATTERING AND NANOSCALE INHOMOGENEITIES IN GLASS-FORMING LIQUIDS

被引:198
作者
MOYNIHAN, CT [1 ]
SCHROEDER, J [1 ]
机构
[1] RENSSELAER POLYTECH INST, DEPT PHYS, TROY, NY 12180 USA
关键词
D O I
10.1016/0022-3093(93)90283-4
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Light scattering from glass-forming liquids exhibits an anomalous time dependence in the glass transition region, e.g. maxima in the scattering intensity versus temperature curves during heating. It is shown that this behavior is consistent with the presence of nanoscale inhomogeneities (density fluctuations) which relax at different rates. It is suggested that this could be the source of non-exponential structural relaxation kinetics. An expression relating the size of these regions to structural relaxation kinetic parameters has been developed and predicts sizes in excellent agreement with those determined by other methods.
引用
收藏
页码:52 / 59
页数:8
相关论文
共 45 条