Experimental study of the liquid-glass transition in propylene carbonate.
Item
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Title
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Experimental study of the liquid-glass transition in propylene carbonate.
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Identifier
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AAI9618062
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identifier
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9618062
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Creator
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Du, Weimin.
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Contributor
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Adviser: Herman Z. Cummins
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Date
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1996
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Language
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English
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Publisher
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City University of New York.
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Subject
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Physics, Condensed Matter | Physics, Optics | Physics, Electricity and Magnetism
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Abstract
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Depolarized light-scattering spectra of propylene carbonate were obtained in the frequency range of 0.2 GHz to 4 GHz at temperatures in the liquid-glass transition region. Analysis of the resulting susceptibility spectra revealed reasonable agreement with the predictions of the idealized mode coupling theory. An extended mode coupling theory analysis corroborated and improved the results obtained with the idealized version. Polarized Brillouin spectra were also obtained, and were analyzed with generalized hydrodynamics. The results indicate that the Cole-Davidson function is not an adequate model for structural relaxation. A simultaneous photon correlation measurement and dielectric susceptibility measurement were carried out on salol to study the {dollar}\alpha{dollar}-relaxation time-scale universality. The result shows that the relaxation times determined from these two techniques have similar temperature dependence, differing only by a constant factor.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
