Evidence for a universal crossover behaviour of the dynamic glass transition

被引：76

作者：

Schönhals, A ^{[1
]}

机构：

[1] Bundesanstalt Mat Forsch & Prufung, D-12205 Berlin, Germany

来源：

EUROPHYSICS LETTERS | 2001年 / 56卷 / 06期

关键词：

D O I：

10.1209/epl/i2001-00115-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By measuring the complex dielectric function over 15 decades of frequency, the temperature dependence of the mean relaxation time and of the dielectric strength is evaluated for six low-molecular-weight glass-forming liquids and one polymeric melt. For the rst time it could be shown that a universal correlation exists between both these quantities with a sharp defined crossover behaviour in the frequency range between 10(7) Hz and 10(8) Hz. So two dynamical different regions of the alpha -relaxation can be distinguished non-ambiguously.

引用

页码：815 / 821

页数：7

共 40 条

[21] RELAXATION PROCESSES IN SUPERCOOLED LIQUIDS [J].

GOTZE, W ;

SJOGREN, L .

REPORTS ON PROGRESS IN PHYSICS, 1992, 55 (03) :241-376

[22]

HAVRILIAK S, 1966, J POLYM SCI C, V14, P89

[23] Relation between freezing-in due to linear cooling and the dynamic glass transition temperature by temperature-modulated DSC [J].

Hensel, A ;

Schick, C .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1998, 235 :510-516

[24] RATE MEMORY OF STRUCTURAL RELAXATION IN GLASSES AND ITS DETECTION BY MULTIDIMENSIONAL NMR [J].

HEUER, A ;

WILHELM, M ;

ZIMMERMANN, H ;

SPIESS, HW .

PHYSICAL REVIEW LETTERS, 1995, 75 (15) :2851-2854

[25] Molecular dynamics in confining space: From the single molecule to the liquid state [J].

Huwe, A ;

Kremer, F ;

Behrens, P ;

Schwieger, W .

PHYSICAL REVIEW LETTERS, 1999, 82 (11) :2338-2341

[26] ULTRASONIC INVESTIGATION OF THE GLASS-TRANSITION IN GLYCEROL [J].

JEONG, YH ;

NAGEL, SR ;

BHATTACHARYA, S .

PHYSICAL REVIEW A, 1986, 34 (01) :602-608

[27] Glass-transition cooperativity onset in a series of random copolymers poly(n-butyl methacrylate-stat-styrene) [J].

Kahle, S ;

Korus, J ;

Hempel, E ;

Unger, R ;

Horing, S ;

Schroter, K ;

Donth, E .

MACROMOLECULES, 1997, 30 (23) :7214-7223

[28] Glassy dynamics [J].

Lunkenheimer, P ;

Schneider, U ;

Brand, R ;

Loidl, A .

CONTEMPORARY PHYSICS, 2000, 41 (01) :15-36

[29] Dielectric spectroscopy of confinement effects in polar materials [J].

Pelster, R .

PHYSICAL REVIEW B, 1999, 59 (14) :9214-9228

[30] Structural relaxation of the fragile glass-former propylene carbonate studied by nuclear magnetic resonance [J].

Qi, F ;

Schug, KU ;

Dupont, S ;

Döss, A ;

Böhmer, R ;

Sillescu, H ;

Kolshorn, H ;

Zimmermann, H .

JOURNAL OF CHEMICAL PHYSICS, 2000, 112 (21) :9455-9462

← 1 2 3 4 →