info:eu-repo/semantics/article
Theory of polymer brushes grafted to finite surfaces
Fecha
2018-04Registro en:
Andreu Artola, Agustín Santiago; Soulé, Ezequiel Rodolfo; Theory of polymer brushes grafted to finite surfaces; John Wiley & Sons Inc; Journal of Polymer Science Part B: Polymer Physics; 56; 8; 4-2018; 663-673
0887-6266
CONICET Digital
CONICET
Autor
Andreu Artola, Agustín Santiago
Soulé, Ezequiel Rodolfo
Resumen
In this work, a model based in strong-stretching theory for polymer brushes grafted to finite planar surfaces is developed and solved numerically for two geometries: stripe-like and disk-like surfaces. There is a single parameter, R∞*, which represents the ratio between the equilibrium brush height and the grafting surface size, that controls the behavior of the system. When R∞* is large, the system behaves as if the polymer were grafted to a single line or point and the brush adopts a cylindrical or spherical shape. In the opposite extreme when it is small, the brush behaves as semi-infinite and can be described as a planar undeformed brush region and an edge region, and the line tension approaches a limiting value. In the intermediate case, a brush with non-uniform height and chain tilting is observed, with a shape and line tension depending on the value of R∞*. Relative stability of disk-shaped, stripe-shaped, and infinite lamellar micelles is analyzed based in this model.