Study of the dynamic structure factor in the beta relaxation regime of polybutadiene

被引：81

作者：

Arbe, A

Buchenau, U

Willner, L

Richter, D

Farago, B

Colmenero, J

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE

[2] UNIV BASQUE COUNTRY, DEPT FIS MAT, E-20080 SAN SEBASTIAN, SPAIN

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.76.1872

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using neutron spin echo and dielectric spectroscopy we have studied the molecular motions of 1-4 polybutadiene in the alpha-beta relaxation regime. At the first peak of the static structure factor the relaxation times follow the temperature dependence of the viscosity, while near the second peak the Arrhenius law of the beta relaxation is observed. Considering localized motions on a length scale of 1.5 Angstrom with the barrier distribution from dielectric spectroscopy the dynamic structure factor in the beta relaxation regime can be described quantitatively.

引用

页码：1872 / 1875

页数：4

共 14 条

[1]

ARBE A, IN PRESS

[2]

BEE M, 1988, QUASIELASTIC NEUTRON, P189

[3]

DIANOUX AJ, 1993, DYNAMICS DISORDERED, V2

[4] SCALING IN THE RELAXATION OF SUPERCOOLED LIQUIDS [J].