Isodirectional packing

{
  "id": "MLC-T-CHM-006178",
  "term": "Isodirectional packing",
  "field": "Chemistry",
  "definition": "The packing in a crystal of chains that have a direction along the axis, such as head-to-tail vinyl polymers, in which every stem points the same way along the chain axis. Mixed up-and-down packing is the alternative. Fully isodirectional packing is unlikely in synthetic polymers except in as-polymerized crystals, whereas parallel packing is found in cellulose I.",
  "synonyms": [
    "parallel packing"
  ],
  "subject": "Polymer",
  "see_also": [
    "directional stem"
  ],
  "references": [
    "PAC, 2011, 83, 1831. 'Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)' on page 1846 (https://doi.org/10.1351/PAC-REC-10-11-13)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/isodirectional-packing/"
}