Computer simulation of adsorbed polymer chains with a different molecular architecture

Simulations of simple models of polymer chains were carried out by the mean s of the dynamic Monte Carlo method. The model chains were confined to a si mple cubic lattice. Three different chain architectures were studied: linea r, star-branched and ring chains. The polymer model chain interacted with a n impenetrable surface with a simple contact attractive potential. It was f ound that size parameters of all these polymers obey scaling laws. The temp eratures of the transitions from weakly to strongly adsorbed chain were det ermined. It was shown for weakly adsorbed chains that ring polymers an alwa ys ca 50% more adsorbed than linear and star-branched ones. The properties of adsorbed linear and star-branched polymers are very similar in the lengt h of chain and the strength of adsorption studied Strongly adsorbed ring po lymers are still more adsorbed but differences between all kinds of chains become less pronounced.