Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 69: Issue 3
Correlation between the a relaxation and the excess wing for polychlorinated biphenyls and glycerol
Authors:
R. Casalini Naval Research Laboratory Chemistry Division code 6120 Washington DC 20375-5342 USA code 6120 Washington DC 20375-5342 USA

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M. Paluch Naval Research Laboratory Chemistry Division code 6120 Washington DC 20375-5342 USA code 6120 Washington DC 20375-5342 USA

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C. Roland Naval Research Laboratory Chemistry Division code 6120 Washington DC 20375-5342 USA code 6120 Washington DC 20375-5342 USA

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Pages:
947–952
Online Publication Date:
02 Nov 2004
Publication Date:
01 Jul 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1020680611531
Keywords:
glass transition; dielectric loss and relaxation
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Abstract  

Data are presented for three glass formers, each having an excess wing in the low temperature dielectric loss spectra. Two polychlorinated biphenyls, whose α relaxations have equivalent temperature dependences, exhibit excess wings that are clearly different. Comparison of the spectra for glycerol at atmospheric pressure and at P=0.9 GPa reveals a different response of the α relaxation and the excess wing. These findings cannot be reconciled with the notion that the excess wing is an inherent part of the α relaxation. Interpretation of the spectra as a superposition of distinct α and β processes, however, is consistent with the observed behavior.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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