Temperature modulated differential scanning calorimetry. Part III. Effect of heat transfer on phase angle in quasi-isothermal ADSC

Z Jiang, C T Imrie, J M Hutchinson

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The effect of heat transfer on the phase measurements of alternating differential scanning calorimetry (ADSC, Mettler-Toledo) has been investigated, continuing previous work, using quasi-isothermal experiments. A new model for the prediction of the effects of heat transfer has been suggested in this work, acid more closely simulates the practical conditions than did the earlier model. In particular, the reference sensor temperature is compared with the sample sensor temperature rather than with the sample temperature itself, as was used in the previous model. Both theoretical simulation and experimental results show that, a phase angle is introduced simply by virtue of heat transfer effects, and that it depends on many experimental parameters. In particular, it is independent of the amplitude of temperature modulation, but depends strongly (and non-linearly) on the frequency and approximately linearly on the sample mass, To a large extent, these dependencies are well predicted by the theoretical model, which also predicts a strong influence of the heat transfer coefficient characterising the quality of the interface been sample and pan. It is shown that the use of a heat transfer fluid can largely eliminate the inconsistencies in the interfacial contact between sample and pan. (C) 1999 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)27-40
Number of pages14
JournalThermochimica Acta
Volume336
Publication statusPublished - 1999

Keywords

  • temperature modulated differential scanning calorimetry
  • heat transfer
  • phase angle
  • polycarbonate
  • quasi-isothermal

Cite this

Temperature modulated differential scanning calorimetry. Part III. Effect of heat transfer on phase angle in quasi-isothermal ADSC. / Jiang, Z ; Imrie, C T ; Hutchinson, J M .

In: Thermochimica Acta, Vol. 336, 1999, p. 27-40.

Research output: Contribution to journalArticle

@article{8b34fe7dd2174766b9de15fc4914f07d,
title = "Temperature modulated differential scanning calorimetry. Part III. Effect of heat transfer on phase angle in quasi-isothermal ADSC",
abstract = "The effect of heat transfer on the phase measurements of alternating differential scanning calorimetry (ADSC, Mettler-Toledo) has been investigated, continuing previous work, using quasi-isothermal experiments. A new model for the prediction of the effects of heat transfer has been suggested in this work, acid more closely simulates the practical conditions than did the earlier model. In particular, the reference sensor temperature is compared with the sample sensor temperature rather than with the sample temperature itself, as was used in the previous model. Both theoretical simulation and experimental results show that, a phase angle is introduced simply by virtue of heat transfer effects, and that it depends on many experimental parameters. In particular, it is independent of the amplitude of temperature modulation, but depends strongly (and non-linearly) on the frequency and approximately linearly on the sample mass, To a large extent, these dependencies are well predicted by the theoretical model, which also predicts a strong influence of the heat transfer coefficient characterising the quality of the interface been sample and pan. It is shown that the use of a heat transfer fluid can largely eliminate the inconsistencies in the interfacial contact between sample and pan. (C) 1999 Elsevier Science B.V. All rights reserved.",
keywords = "temperature modulated differential scanning calorimetry, heat transfer, phase angle, polycarbonate, quasi-isothermal",
author = "Z Jiang and Imrie, {C T} and Hutchinson, {J M}",
year = "1999",
language = "English",
volume = "336",
pages = "27--40",
journal = "Thermochimica Acta",
issn = "0040-6031",
publisher = "Elsevier",

}

TY - JOUR

T1 - Temperature modulated differential scanning calorimetry. Part III. Effect of heat transfer on phase angle in quasi-isothermal ADSC

AU - Jiang, Z

AU - Imrie, C T

AU - Hutchinson, J M

PY - 1999

Y1 - 1999

N2 - The effect of heat transfer on the phase measurements of alternating differential scanning calorimetry (ADSC, Mettler-Toledo) has been investigated, continuing previous work, using quasi-isothermal experiments. A new model for the prediction of the effects of heat transfer has been suggested in this work, acid more closely simulates the practical conditions than did the earlier model. In particular, the reference sensor temperature is compared with the sample sensor temperature rather than with the sample temperature itself, as was used in the previous model. Both theoretical simulation and experimental results show that, a phase angle is introduced simply by virtue of heat transfer effects, and that it depends on many experimental parameters. In particular, it is independent of the amplitude of temperature modulation, but depends strongly (and non-linearly) on the frequency and approximately linearly on the sample mass, To a large extent, these dependencies are well predicted by the theoretical model, which also predicts a strong influence of the heat transfer coefficient characterising the quality of the interface been sample and pan. It is shown that the use of a heat transfer fluid can largely eliminate the inconsistencies in the interfacial contact between sample and pan. (C) 1999 Elsevier Science B.V. All rights reserved.

AB - The effect of heat transfer on the phase measurements of alternating differential scanning calorimetry (ADSC, Mettler-Toledo) has been investigated, continuing previous work, using quasi-isothermal experiments. A new model for the prediction of the effects of heat transfer has been suggested in this work, acid more closely simulates the practical conditions than did the earlier model. In particular, the reference sensor temperature is compared with the sample sensor temperature rather than with the sample temperature itself, as was used in the previous model. Both theoretical simulation and experimental results show that, a phase angle is introduced simply by virtue of heat transfer effects, and that it depends on many experimental parameters. In particular, it is independent of the amplitude of temperature modulation, but depends strongly (and non-linearly) on the frequency and approximately linearly on the sample mass, To a large extent, these dependencies are well predicted by the theoretical model, which also predicts a strong influence of the heat transfer coefficient characterising the quality of the interface been sample and pan. It is shown that the use of a heat transfer fluid can largely eliminate the inconsistencies in the interfacial contact between sample and pan. (C) 1999 Elsevier Science B.V. All rights reserved.

KW - temperature modulated differential scanning calorimetry

KW - heat transfer

KW - phase angle

KW - polycarbonate

KW - quasi-isothermal

M3 - Article

VL - 336

SP - 27

EP - 40

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

ER -