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  Heterophase fluctuations in supercooled liquids and polymers

Fischer, E. W., Bakai, A., Patkowski, A., Steffen, W., & Reinhardt, L. (2002). Heterophase fluctuations in supercooled liquids and polymers. Journal of Non-Crystalline Solids, 307, 584-601. doi:10.1016/S0022-3093(02)01510-7.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-6513-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-7AE0-8
Genre: Journal Article

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 Creators:
Fischer, Erhard W.1, Author              
Bakai, A., Author
Patkowski, A.1, Author              
Steffen, W.1, Author              
Reinhardt, L.1, Author              
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Abstract: Glass-forming liquids and polymers consist of 'solid-like' and 'fluid-like' clusters of a finite lifetime in a dynamic equilibrium. The experimental observations leading to the heterophase fluctuation model are reviewed. They are: (i) long range density fluctuations as measured by static light scattering and ultra small angle X-ray scattering, (ii) ultra- slow hydrodynamic modes of density fluctuations as observed by photon correlation spectroscopy, (iii) temperature depending structural changes as studied by wide angle X-ray scattering. In order to explain these observations a new order parameter n(s)(x, t) is proposed, which describes the local mass fraction of energetically preferred structures ('aperiodic solid states'). The thermodynamic potentials can be analyzed in terms of the temperature dependence of <n(s)(T)>. The alpha- relaxation process of supercooled liquids is directly related to the local fluctuations of n(s)(x, t). (C) 2002 Elsevier Science B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2002-09
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: eDoc: 28610
ISI: 000178038100079
Other: P-02-170
DOI: 10.1016/S0022-3093(02)01510-7
 Degree: -

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Title: Journal of Non-Crystalline Solids
Source Genre: Journal
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Publ. Info: Amsterdam : North-Holland
Pages: - Volume / Issue: 307 Sequence Number: - Start / End Page: 584 - 601 Identifier: ISSN: 0022-3093
CoNE: https://pure.mpg.de/cone/journals/resource/954925416961