  The literature on self- and tracer- diffusion of polymers in solution, and on
tracer diffusion of probe polymers through solutions of matrix polymers, is
reviewed. I show via systematic reanalysis that the entirety of the published
literature has its concentration c and matrix M and probe P molecular weight
dependences described by a single functional form, namely the stretched
exponential in c, P, and M. Correlations of the scaling prefactor and exponents
with polymer molecular weight, concentration, and size are examined. Scaling
parameters for the diffusion of star polymers do not differ substantially from
scaling parameters for the diffusion of linear chains of equal size.
