The equation describing the dependence of the
intrinsic viscosity of a polymer on its
relative
molecular mass (
molecular weight) and having the form:
where
is the intrinsic
viscosity,
and
are constants the values of which depend on the nature of
the polymer and solvent as well as on temperature and
is
usually one of the
relative molecular mass averages.
Notes:
-
The
use of this equation with the relative molecular mass (molecular
weight) is recommended, rather than with molar mass (which has the
dimension of mass divided by amount of substance), since in the
latter case the constant
assumes awkward and variable
dimensions owing to the fractional and variable nature of the
exponent
.
-
Kuhn and Sakurada have also made important
contributions and their names are sometimes included, as, for
example, in the Kuhn–Mark–Houwink–Sakurada
equation.
Source:
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
