ORIENTATIONAL ORDERING OF GRAFTED NONMOBILE ROD POLYMERS

We studied the orientational ordering of grafted rod polymers on the s urface. The rod polymers were nonmobile and allowed to have two config urations: either lying down on the surface or standing up. The only in teraction between the rods were hard core interaction. We computed the orientational order parameter using the recently developed random loc al field theory. We found that the order parameter increased monotonic ally as a function of the concentration of the rods and, thus, there e xisted no pancake-brush transition. (C) 1995 John Wiley & Sons, Inc.