Studies examining the structure of monolayers formed by polymer chains grafted to a surface typically focus on chains attached at one end (tails). Bond fluctuation simulations are performed here to probe monolayers composed of equimolar mixtures of tails and double-grafted loops in which the looped chain length (Nloop) is varied at constant surface density and tail length (Ntail). Loops force the tails to adopt an extended trajectory normal to the surface, resulting in monolayer stratification. As Nloop increases, the height of the tail sublayer increases to a maximum, and then decreases to converge with the loop sublayer as Nloop ! 2Ntail. These results are compared to predictions from a selfconsistent field theory for bidisperse mixtures of grafted tails.
Посилання на статтю:
Polymer Communication Grafted polymer tail/loop mixtures differing in chain length / Daniel C. Driscoll, Harpreet S. Gulati, Richard J. Spontak,b, Carol K. Hall // Polymer. – 1999. – N 40. – P. 5207–5211.