Non-reversing heat flow

{
  "id": "MLC-T-CHM-008048",
  "term": "Non-reversing heat flow",
  "field": "Chemistry",
  "definition": "The portion of the heat flow measured by modulated-temperature DSC that does not follow the imposed temperature oscillation, so it is out of phase with it. It carries kinetic events such as crystallization, enthalpy relaxation near the glass transition, evaporation and curing reactions, whereas the in-phase reversing component carries the heat capacity contribution. Despite its name, non-reversing is not a synonym for irreversible.",
  "subject": "Polymer",
  "see_also": [
    "modulated-temperature DSC"
  ],
  "references": [
    "PAC, 2013, 85, 1017. 'Glossary of terms relating to thermal and thermomechanical properties of polymers (IUPAC Recommendations 2013)' on page 1035 (https://doi.org/10.1351/PAC-REC-12-03-02)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/non-reversing-heat-flow/"
}