Apparent glassy dynamics of an adsorbed polymer chain in the bond‐fluctuation model

The dynamics of a single homopolymer chain strongly adsorbed on a flat surface is investigated by Monte Carlo simulation using the bond‐fluctuation model. Previously observed anomalous glassy dynamics at low temperatures [ Phys. Rev. E 49 , 5420 (1994)] is revisited in detail. We also study the dynamics of a polymer chain confined in a narrow slit of width of a monomer and a modified bond‐fluctuation model in three dimensions to include more relevant bond vectors. We show that the previously observed glassy dynamics is due to an artifact of the bond‐fluctuation model in three dimensions in that it does not cross‐over to the two dimensional bond‐fluctuation model with the correct Rouse dynamics. With the proper inclusion of the extra bond vectors P(2,2,0) and P(3,2,0), no glassy behavior appears for the strongly adsorbed chain.