Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids

Jeppe Dyre; Niels Boye Olsen; Tage Emil Christensen

Local elastic expansion model for viscous-flow activation energies of glass-forming molecular liquids

Jeppe Dyre, Niels Boye Olsen, Tage Emil Christensen

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Abstract

A model for the viscosity of glass-forming molecular liquids is proposed in which a "flow event" requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.

Originalsprog	Engelsk
Tidsskrift	Physical Review B. Condensed Matter and Materials Physics
Vol/bind	53
Udgave nummer	5
Sider (fra-til)	2171-2174
ISSN	1098-0121
Status	Udgivet - 1996

Link til dokument

http://milne.ruc.dk/~dyre/1996_PRB_53_2171.pdf

Citer dette

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abstract = "A model for the viscosity of glass-forming molecular liquids is proposed in which a {"}flow event{"} requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.",

author = "Jeppe Dyre and Olsen, {Niels Boye} and Christensen, {Tage Emil}",

year = "1996",

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AU - Dyre, Jeppe

AU - Olsen, Niels Boye

AU - Christensen, Tage Emil

PY - 1996

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N2 - A model for the viscosity of glass-forming molecular liquids is proposed in which a "flow event" requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.

AB - A model for the viscosity of glass-forming molecular liquids is proposed in which a "flow event" requires a local volume increase. The activation energy for a flow event is identified with the work done in shoving aside the surrounding liquid; this work is proportional to the high-frequency shear modulus, which increases as the temperature decreases. The model is confirmed by experiments on a number of molecular liquids.

M3 - Journal article

SN - 1098-0121

VL - 53

SP - 2171

EP - 2174

JO - Physical Review B. Condensed Matter and Materials Physics

JF - Physical Review B. Condensed Matter and Materials Physics

IS - 5

ER -