Window effect in a discretized model for diffusion of a chain in one dimension

G. R TERRANOVA; H. O. MÁRTIN; C. M.ALDAO

Bahía Blanca

Congreso; 89a. Reunión Nacional de la Asociación Física Argentina; 2004

Universidad Nacional del Sur

We introduce a model to study the diffusion of chains in microporous solids.  The difficulties a chain has to escape from a pore where it is confined is found to strongly depend on the ratio between the chain length and the cage size.  This dynamic effect implies a non standard behavior of the diffusion coefficient.  We found a window effect that can be explained from a new point of view without using any energy argument.