  We re-explore the kinetics of spinodal decomposition in off-critical polymer
blends through numerical simulations of the Cahn-Hilliard equation with the
Flory-Huggins-De Gennes free energy functional. Even in the absence of thermal
noise, the solution of the discretized equation of motion shows coarsening in
the late stages of spinodal decomposition without evidence of pinning,
regardless of the relative concentration of the blend components. This suggests
this free energy functional is not sufficient to describe the physics
responsible for pinning in real blends.
