Fragile glass

{
  "id": "MLC-T-CHM-004634",
  "term": "Fragile glass",
  "field": "Chemistry",
  "definition": "A type of glass-forming liquid characterized by a strong temperature dependence of its viscosity near the glass transition temperature. The viscosity of a fragile glass changes rapidly with small temperature variations, indicating a highly cooperative molecular rearrangement. This behavior is quantified by a high fragility index.",
  "subject": "Polymer",
  "see_also": [
    "glass",
    "Vogel-Fulcher-Tammann equation",
    "fragility index",
    "strong glass"
  ],
  "references": [
    "PAC, 2013, 85, 1017. 'Glossary of terms relating to thermal and thermomechanical properties of polymers (IUPAC Recommendations 2013)' on page 1028 (https://doi.org/10.1351/PAC-REC-12-03-02)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/fragile-glass/"
}