A Statistical Mechanical Model of Polymer Brushes: Equilibrium and Growth

Autor:	Hans Juergen Kreuzer, Lucian Livadaru
Rok vydání:	2004
Předmět:	Surface (mathematics) chemistry.chemical_classification Materials science Stiffness Brush Polymer Polymer brush Kinetic energy law.invention Molecular geometry Chain (algebraic topology) chemistry Chemical physics law Polymer chemistry medicine Physical and Theoretical Chemistry medicine.symptom
Zdroj:	Zeitschrift für Physikalische Chemie. 218:929-956
ISSN:	2196-7156 0942-9352
DOI:	10.1524/zpch.218.8.929.35982
Popis:	We construct a statistical mechanical model for a polymer brush in θ-solvent. The model is exactly solvable for realistic polymer models (e.g. the freely rotating chain and the rotational isomeric state models) and it readily accounts for inhomogeneities of the brush with respect to the plane parallel to the grafting surface. The interactions between neighboring chains is mimicked by the presence of a confinement potential centered on the grafting point of each chain. We explore the model to calculate the equilibrium and kinetic properties of the polymer brush. We find that the variations of the brush free energy and height with the coverage depend strongly on the stiffness of the polymer chain (bond angle) and on the severity of the chain confinement. The results for the growth kinetics of the brush are compared with recent measurements on the formation of a PEG2000 brush from solution.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13658cf9a3156d0fde2cf9a082c74c27 https://doi.org/10.1524/zpch.218.8.929.35982 Zobrazit plný text záznamu