Fragility and elasticity: Description of flow in highly viscous liquids

被引：11

作者：

Buchenau, U. ^{[1
]}

机构：

[1] KFA Julich GmbH, Forschungszentrum, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 17期

关键词：

elasticity; liquid structure; viscosity; GLASS-FORMING LIQUIDS; BISPHENOL-A-POLYCARBONATE; BRILLOUIN-SCATTERING; SUPERCOOLED LIQUIDS; TRANSITION; RELAXATION; DYNAMICS; FORMERS; MODEL;

D O I：

10.1103/PhysRevB.80.172201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fragility (the abnormally strong temperature dependence of the viscosity) of highly viscous liquids is shown to have two sources. The first is the temperature dependence of the barriers between inherent states considered earlier. The second is the recently discovered asymmetry between the actual inherent state and its neighbors. One needs both terms for a quantitative description.

引用

页数：3

共 36 条

[1] Dynamic Arrest in Polymer Melts: Competition between Packing and Intramolecular Barriers [J].

Bernabei, Marco ;

Moreno, Angel J. ;

Colmenero, Juan .

PHYSICAL REVIEW LETTERS, 2008, 101 (25)

[2] NONEXPONENTIAL RELAXATIONS IN STRONG AND FRAGILE GLASS FORMERS [J].

BOHMER, R ;

NGAI, KL ;

ANGELL, CA ;

PLAZEK, DJ .

JOURNAL OF CHEMICAL PHYSICS, 1993, 99 (05) :4201-4209

[3] HIGH-TEMPERATURE BRILLOUIN-SCATTERING IN FUSED QUARTZ [J].

BUCARO, JA ;

DARDY, HD .

JOURNAL OF APPLIED PHYSICS, 1974, 45 (12) :5324-5329

[4] An asymmetry model for the highly viscous flow [J].

Buchenau, U. .

JOURNAL OF CHEMICAL PHYSICS, 2009, 131 (07)

[5] A thermodynamic approach to the fragility of glass-forming polymers -: art. no. 024906 [J].

Cangialosi, D ;

Alegría, A ;

Colmenero, J .

JOURNAL OF CHEMICAL PHYSICS, 2006, 124 (02)

[6] Supercooled liquids and the glass transition [J].

Debenedetti, PG ;

Stillinger, FH .

NATURE, 2001, 410 (6825) :259-267

[7] Fine structure of the main transition in amorphous polymers: Entanglement spacing and characteristic length of the glass transition. Discussion of examples [J].

Donth, E ;

Beiner, M ;

Reissig, S ;

Korus, J ;

Garwe, F ;

Vieweg, S ;

Kahle, S ;

Hempel, E ;

Schroter, K .

MACROMOLECULES, 1996, 29 (20) :6589-6600

[8] Minimal model for beta relaxation in viscous liquids [J].

Dyre, JC ;

Olsen, NB .

PHYSICAL REVIEW LETTERS, 2003, 91 (15)

[9] Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids [J].

Dyre, JC ;

Olsen, NB ;

Christensen, T .

PHYSICAL REVIEW B, 1996, 53 (05) :2171-2174

[10] Colloquium: The glass transition and elastic models of glass-forming liquids [J].

Dyre, Jeppe C. .

REVIEWS OF MODERN PHYSICS, 2006, 78 (03) :953-972

← 1 2 3 4 →