On the adsorption process in polymer brushes: A Monte Carlo study

被引:56
作者
Kopf, A
Baschnagel, J
Wittmer, J
Binder, K
机构
[1] Institut für Physik, Johannes-Gutenberg Universität
[2] Department of Physics and Astronomy, University of Edinburgh, King's Building, Edinburgh EH9 3JZ, Mayfield Road
关键词
D O I
10.1021/ma951083k
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The adsorption process of the single polymer chain in a polymer brush of varying surface coverages is studied by means of Monte Carlo simulations of the bond-fluctuation lattice model. Only the end monomers can adsorb at the grafting surface, whereas inner monomers interact repulsively with it. The brush builds up a steric hindrance which forces the penetrating polymer to stretch strongly and which is responsible for small adsorption probabilities at surface coverages close to the overlap density. The final step of the adsorption process is determined by a fluctuation of the end monomer around its average position, which is comparable to the initial step of the desorption process.
引用
收藏
页码:1433 / 1441
页数:9
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