Pure Appl. Chem., 2009, Vol. 81, No. 2, pp. 351-353
SUBCOMMITTEE ON POLYMER TERMINOLOGY
Dispersity in polymer science (IUPAC Recommendations 2009)
Abstract: This recommendation defines just three terms, viz., (1) molar-mass dispersity, relative-molecular-mass dispersity, or molecular-weight dispersity; (2) degree- of-polymerization dispersity; and (3) dispersity. "Dispersity" is a new word, coined to replace the misleading, but widely used term "polydispersity index" for Mw/Mn and Xw/Xn. The document, although brief, also has a broader significance in that it seeks to put the terminology describing dispersions of distributions of properties of polymeric (and non-polymeric) materials on an unambiguous and justifiable footing.
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