Molar-mass average

{
  "id": "MLC-T-CHM-007474",
  "term": "Molar-mass average",
  "field": "Chemistry",
  "definition": "A statistical average of the molar masses within a polymer sample, reflecting the distribution of different chain lengths. Different types of molar-mass averages exist, such as number-average, weight-average, and z-average, each sensitive to different parts of the distribution. The specific average used depends on the experimental method employed for its determination.",
  "subject": "Polymer",
  "see_also": [
    "(z + 1)-average molar mass",
    "mass-average molar mass",
    "molar mass",
    "number-average molar mass",
    "viscosity-average molar mass",
    "z-average molar mass"
  ],
  "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 82 (https://doi.org/10.1515/pac-2013-0201)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/molar-mass-average/"
}