Fold plane

{
  "id": "MLC-T-CHM-004563",
  "term": "Fold plane",
  "field": "Chemistry",
  "definition": "A crystallographic plane of a chain-folded polymer crystal that contains many stems linked to one another by folds, so it runs along the chain axis and roughly perpendicular to the lamellar faces. In solution-grown polyethylene crystals the {110} planes are the best-known fold planes. The fold surface is a different thing: it is the lamellar face lying tangential to the folds themselves.",
  "subject": "Polymer",
  "references": [
    "Purple Book, 1st ed., p. 83 (http://old.iupac.org/publications/books/author/metanomski.html)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/fold-plane/"
}