background image
E. Fare et al.
Colloids and
Surfaces A
Physicochem.
Eng. Aspects
194 (2001)
197206
A = solution (good solvent situation)
free volume : D
M
-3/5
B = dense matrix/network (gel,
polymer
)
confinement : D
M
-
2
C = dilute network
transition A-B : D
M
-
0.6
2
SCALING RELATIONSHIPS: D=f(M)
Cheng et al. (2002), Macromolecules, 35, 8111-8121
NO GENERAL THEORY
TO ACCOUNT FOR THE
CHEMICAL STRUCTURE
OF DIFFUSING SPECIES