Stoke's Law

(Sperling- 102)

f(0) is the frictional coefficient
R(e) is the equivalent radius that is used to approximate the coil dimensions of a coiled polymer molecule.
eta (0) is the viscosity of the solvent

With the above we can take the volume to radius relationship (below)

and from there move on to the Einstein viscosity relationship (below.)

Last Update- September 2, 1995- wld