WAVE SHAPES IN ALTERNATING DSC

ADSC with its periodical temperature programs combines the features of DSC measured at high heating rate (high sensitivity) with those at lo w heating rate (high temperature resolution). In addition, the ''rever sing'' c(p) effects can be separated from the ''non-reversing'' latent heat effects. Various periodical temperature programs can be applied. This paper compares the different possible temperature programs and t heir algorithms for the c(p) determination for metal, metal oxide and polymer of various properties. Simulated and measured results for vari ous wave shapes and samples are presented. The relevant sample propert ies and their influence on the measurements are identified and guiding rules for the proper choice of the various experimental parameters ar e given. Measurements with different samples, performed with the new M ETTLER TOLEDO STAR(e)-System, are shown and compared with the simulati on results. The simulations and the measurements clearly show that the alternating techniques can yield new information about sample propert ies, but are susceptible to the proper choice of the various experimen tal parameters.