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

被引：162

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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页码：590 / 593

页数：4

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