RATE MEMORY OF STRUCTURAL RELAXATION IN GLASSES AND ITS DETECTION BY MULTIDIMENSIONAL NMR

被引：224

作者：

HEUER, A ^{[1
]}

WILHELM, M ^{[1
]}

ZIMMERMANN, H ^{[1
]}

SPIESS, HW ^{[1
]}

机构：

[1] MAX PLANCK INST MED RES, D-69120 HEIDELBERG, GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.75.2851

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new aspect of the nature of the relaxation rate distribution of alpha relaxation in glasses is analyzed for the example of a polymer: How long does a polymer segment remember its relaxation rate? For a two-state system we describe the rate memory in terms of a single dimensionless parameter. Applying the theory to multidimensional NMR exchange experiments, the rate memory of a polymer slightly above its glass transition temperature is determined. The rate memory is near its theoretical minimum. indicating strong coupling of the individual relaxation modes.

引用

页码：2851 / 2854

页数：4

共 20 条

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