Article (Scientific journals)
Temperature modulated optical refractometry: A quasi-isothermal method to determine the dynamic volume expansion coefficient
Müller, Ulrich; Philipp, Martine; Thomassey, Matthieu et al.
2013In Thermochimica Acta, 555, p. 17-22
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Abstract :
[en] The volume expansion coefficient is a thermodynamic key parameter yielding insight into molecular cohesion and organization of condensed matter. We present here the novel experimental technique temperature modulated optical refractometry (TMOR) to determine not only the static but also the dynamic volume expansion coefficient of transparent condensed matter of cubic or isotropic symmetry. A specialty of TMOR is its capability to measure the volume expansion coefficient under quasi-isothermal conditions. In this experimental mode TMOR is able to differentiate between static, dynamic and kinetic contributions to the volume expansion coefficient. Due to these features TMOR especially qualifies for the investigation of structural changes provoked by structural phase transitions, glass transitions and other structure-related transformations in transparent condensed matter. The scientific potential of this novel experimental technique is demonstrated by evidencing anomalies of the complex volume expansion coefficient accompanying the chemically induced glass transition occurring during the formation of a covalently cross-linked epoxy network.
Disciplines :
Physics
Author, co-author :
Müller, Ulrich ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Philipp, Martine ;  Technische Universität München - TUM
Thomassey, Matthieu ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Sanctuary, Roland ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Krüger, Jan-Kristian ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Language :
English
Title :
Temperature modulated optical refractometry: A quasi-isothermal method to determine the dynamic volume expansion coefficient
Publication date :
2013
Journal title :
Thermochimica Acta
ISSN :
0040-6031
Publisher :
Elsevier Science
Volume :
555
Pages :
17-22
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 29 November 2013

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