ISSN:
1572-8943
Keywords:
crystallisation
;
glass transition
;
Lissajous diagrams
;
modulated temperature power compensation differential scanning calorimetry
;
polyethylene terephthalate/polycarbonate blends
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
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 temperature on the reversibility has been assessed from the Lissajous diagram of heat flow vs. sample temperature. From their reproducibility and symmetry the most effective conditions for operating the MTDSC has been deduced. The specific heat of sapphire has been measured using these operational conditions for comparison with conventional DSC. Phase separated blends of polycarbonate (PC) and polyethylene terephthalate (PET) have been analysed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1010172021047
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