Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-04-15
Journal of Non-Crystalline Solids, 357 267-273, 2011
Physics
Condensed Matter
Soft Condensed Matter
8 pages, 6 figures, Minor corrections
Scientific paper
10.1016/j.jnoncrysol.2010.08.010
The phenomenology of the beta relaxation process in the shear-mechanical response of glass-forming liquids is summarized and compared to that of the dielectric beta process. Furthermore, we discuss how to model the observations by means of standard viscoelastic modeling elements. Necessary physical requirements to such a model are outlined, and it is argued that physically relevant models must be additive in the shear compliance of the alpha and beta parts. A model based on these considerations is proposed and fitted to data for Polyisobutylene 680.
Christensen Tage
Dyre Jeppe C.
Jakobsen Bo
Maggi Claudio
Niss Kristine
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