Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 61: Interfaces and Thin Films I (joint session CPP/DY, organized by CPP)

CPP 61.7: Vortrag

Donnerstag, 10. März 2016, 18:00–18:15, H51

Excluded Volume Effects in Polymer Brushes at Moderate Chain Stretching — •Dirk Romeis and Michael Lang — Leibniz Institut für Polymerforschung Dresden e.V.

We develop a strong stretching approximation for a polymer brush made of self-avoiding polymer chains [1]. The density profile of the brush and the distribution of the end monomer positions in stretching direction are computed and compared with simulation data. We find that our approach leads to a clearly better approximation as compared to previous approaches based upon Gaussian elasticity at low grafting densities (moderate chain stretching), for which corrections due to finite extensibility can be ignored. In addition, we test our predictions for the obtained scaling form of the distribution of free chain ends. In contrast to the previous approaches our scaling form is confirmed by simulation data.

[1] Romeis, D.; Lang, M.; Journal of Chemical Physics 141 (10) 104902 (2014)