PMSE 226 |
| Elena E. Dormidontova and Chun-Chung Chen. Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106-7202 |
| We apply Monte Carlo simulations to study the equilibrium reversible adsorption of linear oligomers end-functionalized with one donor and one acceptor site for complexation with each other or with acceptor sites on a surface. Upon varying the density of adsorption sites we observe a transition from depletion to adsorption on the surface and from individual chain adsorption to brush formation. The polymer density profile in the brush does not follow traditional parabolic law but rather decreases exponentially away from the surface, φ(z)~B exp(-Az), where B depends on the density of adsorption sites and A is a function of bulk polymer concentration, energy of association and oligomer length. We analyze the influence of the bulk oligomer concentration, density of adsorption sites, oligomer length and strength of association on the occupancy of adsorption sites, thickness of the adsorbed polymer layer, average chain length and chain stretching in the layer. |
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Functional Polymer Thin Films for Switching, Sensing, and Adaptive Applications
1:15 PM-5:25 PM, Tuesday, March 30, 2004 Coast -- Park B, Oral
Division of Polymeric Materials: Science and Engineering |