Free volume

Term · Chemistry · MLC-T-CHM-004659

The unoccupied space within a material that is not occupied by the atoms or molecules themselves, but is available for their movement. This concept is particularly relevant in polymers, where it influences properties such as diffusion, viscosity, and glass transition temperature. It is often expressed as a fraction of the total volume.

Table 1. Record
Identifier	MLC-T-CHM-004659
Field	Chemistry
Subject	Polymer
References	PAC, 2015, 87, 71. 'Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)' on page 90 (https://doi.org/10.1515/pac-2013-0201)

Record as JSON

{
  "id": "MLC-T-CHM-004659",
  "term": "Free volume",
  "field": "Chemistry",
  "definition": "The unoccupied space within a material that is not occupied by the atoms or molecules themselves, but is available for their movement. This concept is particularly relevant in polymers, where it influences properties such as diffusion, viscosity, and glass transition temperature. It is often expressed as a fraction of the total volume.",
  "subject": "Polymer",
  "references": [
    "PAC, 2015, 87, 71. 'Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)' on page 90 (https://doi.org/10.1515/pac-2013-0201)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/free-volume/"
}

Record 4,936 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.