Confinedrandom-flightpolymerchainsinsolution: exclusion from micropores and distribution near barriers

The statistical basis of the entropic repulsion of dissolved random-flight polymer chains from impenetrable passive barriers is described. The application of these ideas to the partial exclusion of linear and branched polymer chains from micropores and to the polymer concentration profile near a barrier is reviewed with emphasis on the mean projection of the chain as a measure of the exclusion effect.