Extraction fractionation

{
  "id": "MLC-T-CHM-004292",
  "term": "Extraction fractionation",
  "field": "Chemistry",
  "definition": "A method used to separate a polymer sample into fractions based on differences in molecular weight or chemical composition, by selectively extracting components using a series of solvents or solvent mixtures. This technique relies on the differential solubility of polymer chains. It is often employed to characterize the molecular weight distribution of complex polymer samples.",
  "subject": "Polymer",
  "see_also": [
    "polymer-poor phase",
    "polymer-rich phase",
    "macromolecule",
    "power",
    "solubility"
  ],
  "references": [
    "Purple Book, 1st ed., p. 68 (http://old.iupac.org/publications/books/author/metanomski.html)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/extraction-fractionation/"
}