J. Phys. II France
Volume 3, Numéro 7, July 1993
Page(s) 1141 - 1159
DOI: 10.1051/jp2:1993188
J. Phys. II France 3 (1993) 1141-1159

End effects in adsorption of homopolymers and triblock copolymers

F. Aguilera-Granja1 and Ryoichi Kikuchi2

1  Instituto de Física "Manuel Sandoval Vallarta", Universidad Autónoma de San Luis Potosí, San Luis Potosí, S.L.P. 78000, México
2  Department of Materials Science and Engineering, University of California, Los Angeles, CA 90024-1595, U.S.A.

(Received 29 October 1992, revised 18 February 1993, accepted 23 March 1993)

The effects of end segments on the conformation of polymers adsorbed on a flat surface are studied theoretically by the use of an analytical statistical mechanics (the Cluster Variational Method, CVM) and a simulation based on the CVM output. Based on the simulation, we derive information on the thickness of the adsorbed layer, the number of loops, the area covered by a polymers, fractions of the train, tail and loop portions of an adsorbed polymer, the average number of tails, and related geometrical quantities. The conformations of the adsorbed polymers show a strong dependence on the end segment behavior. The result derived in the paper give us guidelines for obtaining some specific conformation when triblock copolymers are used in the adsorption studies.

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