Tung distribution

of a macromolecular assembly

A continuous distribution with the differential mass-distribution function of the form:

$f w x d x = a b x b − 1 e − a x b d x$

where $x$ is a parameter characterizing the chain length, such as relative molecular mass or degree of polymerization and $a$ and $b$ are positive adjustable parameters.

Source:

Purple Book, p. 56