What needs to be clarified
Review specific melting enthalpy, mass and units and the influence of cycle and integration boundaries.
Materials to prepare
- Raw unnormalized thermograms and program
- Sample and crucible weighings and entered mass
- Baseline, integration and calibration settings
What to compare
Check logged mass, heat-flow integration and mass normalization. Compare heating rates, first and repeat cycles, baselines and overlapping effects. Recalculate justified integrals; do not call a fraction crystallinity without a suitable reference and composition accounting.
Possible outcome of the analysis
A recalculated enthalpy table may explain sensitivity to mass and curve processing and identify differences persisting under comparable conditions.
Limits of the conclusions
Enthalpy differences prove no substitution, manufacturer or batch defect. Thermal history, fillers and overlapping transitions may limit interpretation of correctly normalized data.