Wels CampusEngineering

METTLER TOLEDO DSC 3 - dynamic differential scanning calorimeter

Dynamic differential scanning calorimetry is used to determine the conversion process of polymer materials. For this purpose, samples are placed in a crucible and the temperaturedependent heat flow is measured. By simultaneously measuring an empty reference crucible, the endo- and exothermic transitions of the material can be determined. In the case of polymers, this serves to determine the glass transition temperature and the melting temperature range in the case of partially crystalline thermoplastics.
The characteristics of these transitional regions can be used for the qualitative characterisation of plastics. Furthermore, the enthalpy of fusion can be calculated from the curve shape. A further function of the DSC is the determination of the specific heat capacity (cp ), which is essential for phase transition calculations and the design of plastic processing machines. The measurements can be carried out in a temperature range from -150°C to 700°C. Typical heating rates are 2 to 10 K/min. In the case of samples that could easily oxidise or degrade, it is possible to flush the measuring chamber with inert gas in order to counteract the degradation.