Precipitation fractionation

{
  "id": "MLC-T-CHM-009348",
  "term": "Precipitation fractionation",
  "field": "Chemistry",
  "definition": "A method for separating a polymer sample into fractions based on differences in molecular weight or chemical composition. This technique involves dissolving the polymer in a solvent and then gradually adding a non-solvent to induce the precipitation of polymer chains. The fractions are collected at different stages of precipitation, often by varying temperature or non-solvent concentration.",
  "subject": "Polymer",
  "see_also": [
    "macromolecule",
    "polymer-rich phase",
    "power",
    "solubility"
  ],
  "references": [
    "Purple Book, 1st ed., p. 68 (http://old.iupac.org/publications/books/author/metanomski.html)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/precipitation-fractionation/"
}