Schulz–Zimm distribution 

https://doi.org/10.1351/goldbook.S05502
In an assembly of macromolecules, a continuous distribution with the differential mass-distribution function of the form: fw(x) dx=ab+1Γ(b+1) xb e−a x dx where x is a parameter characterizing the chain length, such as relative molecular mass or degree of polymerization, a and b are positive adjustable parameters, and (Γ(b+1)) is the gamma function of (b+1).
Source:
Purple Book, 1st ed., p. 56 [Terms] [Book]
Citation: 'Schulz–Zimm distribution' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S05502 RIS BibTex EndNote
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Last revised: February 24, 2014