Dynamics of Polymer Chains Confined in Slit-Like Pores
نویسندگان
چکیده
Monte Carlo simulations of an off-lattice bead spring model of polymer chains are presented, confining the chains between two repulsive parallel planes a distance D apart. Varying the chain length N from N = 16 to N = 128, we show that under good solvent conditions the chains behave like two-dimensional self-avoiding walks, their mean square gyration radius scales as (R() cc N~" with u = 3/4. The density profile across the slit is independent of N and maximal in the center of the slit. The dynamical properties of the chains are found to be in full agreement with the Rouse model with excluded volume in d = 2 dimensions, the relaxation times vary like T cc N~ with z = 2u +1 = 5/2, the diffusion constant still being given by DN cc 1/N. The dynamical behavior of various mean square displacements is analyzed in detail.
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