Miscibility gap

{
  "id": "MLC-T-CHM-007410",
  "term": "Miscibility gap",
  "field": "Chemistry",
  "definition": "The region of a temperature-composition or pressure-composition phase diagram, enclosed by the coexistence (binodal) curve, in which a mixture separates into two or more coexisting phases. In polymer blends it forms below an upper consolute temperature or above a lower consolute temperature. The spinodal curve lies inside the gap and divides metastable states from unstable ones.",
  "subject": "Polymer",
  "see_also": [
    "miscibility",
    "upper critical solution temperature"
  ],
  "references": [
    "PAC, 2004, 76, 1985. 'Definition of terms related to polymer blends, composites, and multiphase polymeric materials (IUPAC Recommendations 2004)' on page 1996 (https://doi.org/10.1351/pac200476111985)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/miscibility-gap/"
}