Abstract
The influence of wetting forces exerted by an interface on the coarsening mechanism of two coexisting liquid phases is studied. Experiments show that in a polymer mixture undergoing spinodal decomposition domains of characteristic length l coarsen with time t according to the power law l\ensuremath{\sim}${\mathit{t}}^{3/2}$ in the direction parallel to a quartz interface. This is in contrast to the bulk behavior, where l\ensuremath{\sim}t. Although a preliminary argument suggests that wetting effects driven by van der Walls forces are responsible for the growth exponent, a proper hydrodynamic theory is not yet available.
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