Polymer brushes near the crystallization density |
| |
Authors: | G -L He H Merlitz J -U Sommer C -X Wu |
| |
Institution: | (1) Softmatter Lab, Department of Physics, Xiamen University, 361005 Xiamen, PRC;(2) Leibniz-Institut für Polymerforschung Dresden, Germany |
| |
Abstract: | In this paper, polymer brushes are studied via molecular-dynamics simulations at very high grafting densities, where the crossover
between the brush regime and the polymer-crystal regime is taking place. This crossover is directly observed with the structure
factor and pair-correlation function. With increasing grafting density, this crystallization is progressing from the core
layer of the brush towards the surface layer. The same process is analyzed using the lateral fluctuations of the monomers
as a signature of their diminishing mobility. Additionally, bond forces and the chain excess free energy indicate a transition
from the brush regime to the overstretched regime, which is in agreement with predictions of a modified self-consistent field
theory. |
| |
Keywords: | 82 35 Gh Polymers on surfaces adhesion 82 35 Lr Physical properties of polymers 36 20 -r Macromolecules and polymer molecules |
本文献已被 PubMed SpringerLink 等数据库收录! |
|