The application of modulated temperature power compensation DSC to the characterisation of polymer blends

Citation
Na. Bailey et Jn. Hay, The application of modulated temperature power compensation DSC to the characterisation of polymer blends, J THERM ANA, 56(3), 1999, pp. 1011-1016
Citations number
5
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN journal
13886150 → ACNP
Volume
56
Issue
3
Year of publication
1999
Pages
1011 - 1016
Database
ISI
SICI code
1388-6150(1999)56:3<1011:TAOMTP>2.0.ZU;2-U
Abstract
A modulated temperature power compensated differential scanning calorimeter , MTDSC, has been built from a standard Perkin-Elmer DSC model-2 such that a computer generated voltage has been applied to induce a sinusoidal change in sample temperature superimposed on a linear heating rate. The effect of amplitude of the temperature fluctuation, modulation period and block temp erature on the reversibility has been assessed from the Lissajous diagram o f heat flow vs, sample temperature. From their reproducibility and symmetry the most effective conditions for operating the MTDSC has been deduced. Th e specific heat of sapphire has been measured using these operational condi tions for comparison with conventional DSC. Phase separated blends of polycarbonate (PC) and polyethylene terephthalate (PET) have been analysed.