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Showing 1 to 4 of 4 for “"beta-relaxation"”.
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Comparison of conventional and super-glassy polymers
… Spectroscopy (BDS). For both polymers, one relaxation process, denoted as beta*, and a conductivity contribution were found. Due to a very high activation energy for this beta*–relaxation (86 kJ/mol for PIM-1 and 99 kJ/mol for Matrimid) and the high temperature range where the peak appeared, …
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Primary and Secondary Relaxations in Neat and Binary Glass Formers Studied by Means of Dielectric Spectroscopy
… temperature evolution of primary and secondary relaxation phenomena. The other objective is to gain insight into the microscopic origin of the beta-process (a secondary relaxation observed for T<Tg) in neat and binary systems, as well as the primary relaxation phenomena in binary systems. The …
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A viscoelastic hydrodynamic approach to the density fluctuations in classical liquids
… the utilization of a time-dependent fourth-order relaxation tensor. This relaxation tensor provides a unified representation to examine the effects of different viscoelastic mechanisms and anisotropy. Given specific approximations to the relaxation tensor by viscoelastic models, the collective …
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Molekulare Dynamik in binären Glasbildnern studiert mittels 31P- und 2H-NMR
… der zweidimensionalen (2D-) Spektren und der Spinrelaxation ermöglicht eine selektive Betrachtung der beiden Komponenten. Es werden Systeme untersucht, welche sich durch eine hohe „dynamische Asymmetrie“, d.h. durch einen großen Unterschied in der Glasübergangstemperatur der reinen Spezies …