Differential scanning calorimetry calorimetric calibration

Differential scanning calorimetry (DSC) was used in investigating the curing kinetics of the unsaturated polyester resin. For the study, we used a DuPont 1090 Thermal Analyzer, equipped with a 910 DSC Module. Indium was used for temperature and calorimetric calibrations, following the procedure described in the operating meinual of the instrximent. The experimental procedure employed is very similar to that described in the literature (8-13) cind we have discussed it elsewhere (14). 

The thermal behavior of ot-chitin was examined by differential scanning calorimetry (DSC) using a DSC-25 Mettler instrument. Samples (each 5 mg) were hermetically sealed in aluminum pans and scanned over a temperature range of 0-350 °C at a scan rate of 5 °C/min. The instrument was calibrated using indium, and the calorimetric data were analyzed using STAR software (version 9). 

The temperature dependence of K for the DuPont DTA sample holder is illustrated in Figure 5.39 (106). As can be seen, the calorimetric sensitivity of the apparatus decreases with temperature that is, more heat is required per unit area. In differential scanning calorimetry, such as with the Perkin-Elmer instrument, K is independent of temperature hence, only a one-temperature calibration is required. The problem of multitemperature calibration in DTA is also eliminated in the technique of constant-sensitivity DTA proposed by Wendlandt and Williams (107). 

DIFFERENTIAL SCANNING CALORIMETRY SIMULTANEOUS TEMPERATURE AND CALORIMETRIC CALIBRATION... 

K.-H. Breuer and W. Eysel, The calorimetric calibration of differential scanning calorimetry cells, Thermochimica Acta 57, 317-329 (1982). 

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