Dynamics of glass-forming polymers: "Homogeneous" versus "heterogeneous" scenario

被引：158
|
作者：
Arbe, A
Colmenero, J
Monkenbusch, M
Richter, D
机构：
[1] Univ Basque Country, Fac Quim, Dept Fis Mat, E-20080 San Sebastian, Spain
[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.81.590
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The question of whether the primary alpha relaxation in glass-forming systems is homogeneous or heterogeneous in nature is investigated by incoherent neutron scattering techniques in glass-forming polymers. It is shown that the momentum transfer dependence of the Kohlrausch-Williams-Watts relaxation time allows one to discriminate between these two limiting scenarios. From the results obtained we can conclude that the apparent stretching of the alpha-relaxation function relates dominantly to sublinear diffusion and is not a result of heterogeneities in the material.
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收藏
页码：590 / 593
页数：4
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