DETERMINATION OF SOME PARAMETERS TO BE UTILIZED IN CORRECTING DSC CURVES FOR EFFECTS DUE TO THERMAL LAG .1. THERMAL LAG IN SPECIFIC-HEAT MEASUREMENTS

In many applications of differential scanning calorimetry (DSC), notably the determination of specific heat functions, the analysis of reaction kinetics and the determination of purity, the instantaneous differential heat flow and the instantaneous actual sample temperature are required. The measurement of both is influenced in DSC by thermal lag effects, i.e. signal filtering and thermal gradients. A procedure is proposed which permits, under certains experimental conditions, correction of thermal lag by means of characteristic time constants having material and instrumental components. The validity of the results is enhanced by the comparison with those obtained by other authors. © 1979 Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest.