Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 54: Issue 2
A Method for Analysis of the Measured Curves of TMDSC Investigation in the Melting Region of Polymers
Authors:
J. Schawe Universität Ulm Sektion für Kalorimetrie D-89069 Ulm D-89069 Ulm

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E. Bergmann IFA GmbH Schillerstr. 18 D-89077 Ulm Germany Schillerstr. 18 D-89077 Ulm Germany

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W. Winter IFA GmbH Schillerstr. 18 D-89077 Ulm Germany Schillerstr. 18 D-89077 Ulm Germany

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Pages:
565–576
Online Publication Date:
13 Dec 2004
Publication Date:
01 Nov 1998
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010142510263
Keywords:
melting; polymers; signal analysis; TMDSC
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Abstract  

The measured signal of the temperature-modulated differential scanning calorimetry (TMDSC) is discussed in the case of polymer melting. The common data evaluation procedure of TMDSC-signals is the Fourier analysis. The resulting information is the amplitude and the phase shift of the first harmonic of the periodic heat flow component. It is shown that this procedure is not sufficient for quantitative discussions if deviations from the symmetric curve shape occur in the measured heat flow curves. For polymer melting it is demonstrated that asymmetric curves will be measured if the experimental temperature amplitude is too large. In this paper a data evaluation method is presented, which is based on the Fourier transform of the measured curves. The peaks of the first and second harmonics in the resulting spectra are used for the analysis of the asymmetry of the measured curves. In the case of polymer melting this analysis yields the maximum temperature amplitude which follows a correct linear data evaluation. This maximum temperature amplitude depends on the material.

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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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