Relaxation spectroscopies of viscous liquids

Data on supercooled liquids obtained by specific heat spectroscopy, dielectric susceptibility, ultrasonic attenuation and frequency-dependent shear modulus are reviewed. Where these different measurements have been made on the same sample, they measure the same average relaxation times. In addition,...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1991-06, Vol.131, p.32-36
Main Authors: Wu, Lei, Dixon, Paul K, Nagel, Sidney R, Williams, Bruce D, Carini, John P
Format: Article
Language:English
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Summary:Data on supercooled liquids obtained by specific heat spectroscopy, dielectric susceptibility, ultrasonic attenuation and frequency-dependent shear modulus are reviewed. Where these different measurements have been made on the same sample, they measure the same average relaxation times. In addition, dielectric data are presented covering 13 decades in frequency. These data can all be scaled such tath, independent of temperature, they all fall on a single curve. Data for the primary relaxation of different samples can be overlaid to give a universal curve determined by only two parameters, peak frequency and width. This scaling form is different from any as yet proposed in the literature. Interesting scaling is also found when the secondary relaxation is included.
ISSN:0022-3093
1873-4812
DOI:10.1016/0022-3093(91)90267-A