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The application of modulated differential scanning calorimetry to the glass transition

Theoretical analysis using a single parameter model

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Abstract

The modulated differential scanning calorimetry (MDSC) technique superimposes upon the conventional DSC heating rate a sinusoidally varying modulation. The result of this modulation of the heating rate is a periodically varying heat flow, which can be analysed in various ways. In particular, MDSC yields two components (‘reversing’ and ‘non reversing’) of the heat flow, and a phase angle. These each show a characteristic behaviour in the glass transition region, but their interpretation has hitherto been unclear. The present work clarifies this situation by a theoretical analysis of the technique of MDSC, which introduces a kinetic response of the glass in the transition region. This analysis is able to describe all the usual features observed by MDSC in the glass transition region. In addition, the model is also able to predict the effects of the modulation variables, and some of these are discussed briefly.

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Authors and Affiliations

  1. Engineering Department, Aberdeen University, AB9 2UE, Aberdeen, Scotland, UK

    J. M. Hutchinson

  2. Laboratori de Termodinàmica ETSEIT, Departament de Màquines i Motors Termics, Universitat Politècnica de Catalunya, Carrer de Colom 11, 08222, Terrassa, Barcelona, Spain

    S. Montserrat

Authors
  1. J. M. Hutchinson
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  2. S. Montserrat
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Additional information

Financial support has been provided by the DGICYT (Project no.PB93/1241). J.M.H. wishes to acknowledge financial assistance for a sabbatical period from the ‘Generalitat de Catalunya’.

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Hutchinson, J.M., Montserrat, S. The application of modulated differential scanning calorimetry to the glass transition. Journal of Thermal Analysis 47, 103–115 (1996). https://doi.org/10.1007/BF01982690

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  • DOI: https://doi.org/10.1007/BF01982690

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