The A4 glass transition singularity

S. Flach; W. Götze; L. Sjögren

doi:10.1007/BF01308254

The A₄ glass transition singularity

S. Flach, W. Götze, L. Sjögren

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Abstract

Formulae for the β-relaxation process as obtained within the mode coupling theory for the dynamics of supercooled liquids are derived for states near an A₄ glass transition singularity. A discussion of the expected anomalies of susceptibility spectra is presented. In particular the parameter regions for (1/f)-noise, for spectra exhibiting two minima and regions of linear variations in ln(1/f) are identified. The results are used to interprete quantitatively dielectric data for the following polymeric systems: polychlorotrifluoroethylene (PCTFE), polyhexamethylene sebacamide (nylon 610), polyoxymethylene (delrin) and polyparaethylene oxybenzoate (PEOB).

Original language	English
Pages (from-to)	29-42
Number of pages	14
Journal	Zeitschrift für Physik B Condensed Matter
Volume	87
Issue number	1
DOIs	https://doi.org/10.1007/BF01308254
State	Published - Feb 1992

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abstract = "Formulae for the β-relaxation process as obtained within the mode coupling theory for the dynamics of supercooled liquids are derived for states near an A4 glass transition singularity. A discussion of the expected anomalies of susceptibility spectra is presented. In particular the parameter regions for (1/f)-noise, for spectra exhibiting two minima and regions of linear variations in ln(1/f) are identified. The results are used to interprete quantitatively dielectric data for the following polymeric systems: polychlorotrifluoroethylene (PCTFE), polyhexamethylene sebacamide (nylon 610), polyoxymethylene (delrin) and polyparaethylene oxybenzoate (PEOB).",

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AU - Flach, S.

AU - Götze, W.

AU - Sjögren, L.

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AB - Formulae for the β-relaxation process as obtained within the mode coupling theory for the dynamics of supercooled liquids are derived for states near an A4 glass transition singularity. A discussion of the expected anomalies of susceptibility spectra is presented. In particular the parameter regions for (1/f)-noise, for spectra exhibiting two minima and regions of linear variations in ln(1/f) are identified. The results are used to interprete quantitatively dielectric data for the following polymeric systems: polychlorotrifluoroethylene (PCTFE), polyhexamethylene sebacamide (nylon 610), polyoxymethylene (delrin) and polyparaethylene oxybenzoate (PEOB).

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The A₄ glass transition singularity

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