Aging of the Secondary Relaxation to Probe Structural Relaxation in the Glassy State

被引：148

作者：

Casalini, R. ^{[1
,2
]}

Roland, C. M. ^{[2
]}

机构：

[1] George Mason Univ, Dept Chem, Fairfax, VA 22030 USA

[2] USN, Res Lab, Div Chem, Washington, DC 20375 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 03期

关键词：

DIELECTRIC-RELAXATION; BETA-RELAXATION; ALPHA-RELAXATION; TEMPERATURE-DEPENDENCE; MOLECULAR GLASS; VISCOUS-LIQUIDS; TRANSITION; VISCOSITY; DYNAMICS; SPECTROSCOPY;

D O I：

10.1103/PhysRevLett.102.035701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The importance of glass formation and the glass transition is linked to their universality, embracing many classes of materials: metallic, inorganic, and organic. There is no agreement on what drives this phenomenon; moreover, experiments are challenging due to the nonequilibrium nature of the glassy state. We present a new approach that provides information about the very slow structural relaxation in the glassy state and reveals the important role of the secondary relaxation. Structural (alpha) relaxation times for glassy polyvinylethylene were determined from changes in the properties of the secondary process during physical aging. These alpha-relaxation times exceed 3 years, making them inaccessible via direct measurement.

引用

页数：4

共 38 条

[1] alpha-Relaxation in the glass-transition range of amorphous polymers .2. Influence of physical aging on the dielectric relaxation [J].

Alegria, A ;

Goitiandia, L ;

Telleria, I ;

Colmenero, J .

MACROMOLECULES, 1997, 30 (13) :3881-3887

[2] Identifying the genuine Johari-Goldstein β-relaxation by cooling, compressing, and aging small molecular glass-formers [J].

Capaccioli, S ;

Prevosto, D ;

Lucchesi, M ;

Rolla, PA ;

Casalini, R ;

Ngai, KL .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2005, 351 (33-36) :2643-2651

[3] Connection between the high-frequency crossover of the temperature dependence of the relaxation time and the change of intermolecular coupling in glass-forming liquids [J].

Casalini, R ;

Ngai, KL ;

Roland, CM .

PHYSICAL REVIEW B, 2003, 68 (01)

[4]

CASALINI R, J PHYS CH B IN PRESS

[5] ROTATIONAL REORIENTATION DYNAMICS OF DISPERSE RED-1 IN POLYSTYRENE - ALPHA-RELAXATION DYNAMICS PROBED BY 2ND-HARMONIC GENERATION AND DIELECTRIC-RELAXATION [J].

DHINOJWALA, A ;

WONG, GK ;

TORKELSON, JM .

JOURNAL OF CHEMICAL PHYSICS, 1994, 100 (08) :6046-6054

[6] Analysis of recent measurements of the viscosity of glasses [J].

Fulcher, GS .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1925, 8 (06) :339-355

[7] Observation of fluctuation-dissipation-theorem violations in a structural glass [J].

Grigera, TS ;

Israeloff, NE .

PHYSICAL REVIEW LETTERS, 1999, 83 (24) :5038-5041

[8] PHYSICAL AGING IN POLYMER GLASSES [J].

HODGE, IM .

SCIENCE, 1995, 267 (5206) :1945-1947

[9] EFFECTS OF ANNEALING AND PRIOR HISTORY ON ENTHALPY RELAXATION IN GLASSY-POLYMERS .6. ADAM-GIBBS FORMULATION OF NONLINEARITY [J].

HODGE, IM .

MACROMOLECULES, 1987, 20 (11) :2897-2908

[10] EFFECT OF ANNEALING ON THE SECONDARY RELAXATIONS IN GLASSES [J].

JOHARI, GP .

JOURNAL OF CHEMICAL PHYSICS, 1982, 77 (09) :4619-4626

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