Comparative study of the dynamic glass transition temperature by DMA and TMDSC

Measurements of the glass transition temperature obtained by dynamic mechanical analysis (DMA) and temperature modulated differential scanning calorimetry (TMDSC) are reported to be different. This was mainly attributed to the frequency effect. To obtain comparable measurements, experimental conditi...

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Bibliographic Details
Published in:Polymer testing 2010-12, Vol.29 (8), p.1002-1006
Main Authors: Gracia-Fernández, C.A., Gómez-Barreiro, S., López-Beceiro, J., Tarrío Saavedra, J., Naya, S., Artiaga, R.
Format: Article
Language:English
Subjects:
Applied sciences
Differential scanning calorimetry
DMA
Dynamic tests
Dynamics
Exact sciences and technology
Glass transition temperature
Mechanical analysis
Phase transformations
Physical properties
Polymer industry, paints, wood
Properties and testing
Technology of polymers
Testing and control
Thermal properties
Thermic properties and inflammability
TMDSC
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Summary:Measurements of the glass transition temperature obtained by dynamic mechanical analysis (DMA) and temperature modulated differential scanning calorimetry (TMDSC) are reported to be different. This was mainly attributed to the frequency effect. To obtain comparable measurements, experimental conditions were studied. Although some experimental issues had to be fixed, it was possible to apply the same frequency and temperature using quasi-isothermal conditions in both instruments. The method was tested with three different polymer samples. It was then found that when choosing a suitable response parameter, i.e. the phase angle, the dynamic glass transition temperature values obtained by both methods are practically the same.
ISSN:0142-9418
1873-2348
DOI:10.1016/j.polymertesting.2010.09.005