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Monte Carlo Simulation of Adsorption of Di-Block Copolymers

Published online by Cambridge University Press:  28 February 2011

Wan Y. Shih ,
Wei-Heng Shill  and
Ilhan A. Aksay
Wan Y. Shih
Affiliation:
Department ofMateriaIs Science and Engineering, and Advanced Materials Technology Program, The Washington Technology Center,University of Washington, Seattle, WA 98195
Wei-Heng Shill
Affiliation:
Department ofMateriaIs Science and Engineering, and Advanced Materials Technology Program, The Washington Technology Center,University of Washington, Seattle, WA 98195
Ilhan A. Aksay
Affiliation:
Department ofMateriaIs Science and Engineering, and Advanced Materials Technology Program, The Washington Technology Center,University of Washington, Seattle, WA 98195
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Abstract

In this paper we are concerned with the morphology of the polymers adsorbedon surfaces, in particular di-block copolymers. Our work is motivated by the experimental findings of Fladziioannou et al. [1] on the steric forces between two adsorbed layers of di-block poly(vinyl-2-pyridine)\ polystyrene (PV2P\ PS) copolymer on mica surfaces. The PV2P block binds strongly on the mica surfaces and the PS block extends into thesolvent toluene (good solvent for PS). Hadziiouannou et al. found that the repulsive forces between the two surfaces start at a distance 1) larger than 10 times the radius of gyration RG of a free P' in toluene. Furthermore, the starting distance D increases with increasing degree of polymerization N of PS in a fashion I) ~ Na with a close to I. We,tudy the adsorption of di-block copolymer with Monte Carlo simulations. The Monte Carlo simulations are especially powerful in dealing with kinetics which is important in systems where hysteresis is observed II1 and cannot be appropriately taken into account by analytical (or numerical) calculations based onequilibrium assumptions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 140: Symposium S – New Materials Approaches to Tribology: Theory and Applications , 1988 , 431
Copyright
Copyright © Materials Research Society 1989

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References

1. Hadziioannou, G., Patel, S., Granick, S., and Tirrel, M., J. Am. Chem. Soc. 108, 2869 (1986).CrossRefGoogle Scholar
2. For general inforn-ations, see Gennes, P. G. de, Scaling Concepts in Polymer Physics, Cornell University Press, Ithaca, N.Y., 1979.Google Scholar
3. Alexander, S., J. Phys. (Paris), 38, 983 (1977); P. G. de Gennes, Macromolecules, 13, 1069 (1980).CrossRefGoogle Scholar