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
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.