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Fundamentals of Phase Separation in Polymer Blend Thin Films

(Autor)

Buch | Hardcover
XVI, 171 Seiten
2015 | 2015
Springer International Publishing (Verlag)
978-3-319-19398-4 (ISBN)

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Fundamentals of Phase Separation in Polymer Blend Thin Films - Sam Coveney
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This work sheds new light on fundamental aspects of phase separation in polymer-blend thin films. A key feature underlying the theoretical models is the unification of one-dimensional thermodynamic phase equilibria with film evolution phenomena in two- and three dimensions. Initially, an established 'phase portrait' method, useful for visualising and calculating phase equilibria of polymer-blend films, is generalised to systems without convenient simplifying symmetries. Thermodynamic equilibria alone are then used to explain a film roughening mechanism in which laterally coexisting phases can have different depths in order to minimise free energy. The phase portraits are then utilised to demonstrate that simulations of lateral phase separation via a transient wetting layer, which conform very well with experiments, can be satisfactorily explained by 1D phase equilibria and a 'surface bifurcation' mechanism. Lastly, a novel 3D model of coupled phase separation and dewetting is developed, which demonstrates that surface roughening shadows phase separation in thin films.

This work sheds new light on fundamental aspects of phase separation in polymer-blend thin films. A key feature underlying the theoretical models is the unification of one-dimensional thermodynamic phase equilibria with film evolution phenomena in two- and three dimensions. Initially, an established 'phase portrait' method, useful for visualising and calculating phase equilibria of polymer-blend films, is generalised to systems without convenient simplifying symmetries. Thermodynamic equilibria alone are then used to explain a film roughening mechanism in which laterally coexisting phases can have different depths in order to minimise free energy. The phase portraits are then utilised to demonstrate that simulations of lateral phase separation via a transient wetting layer, which conform very well with experiments, can be satisfactorily explained by 1D phase equilibria and a 'surface bifurcation' mechanism. Lastly, a novel 3D model of coupled phase separation and dewetting is developed, which demonstrates that surface roughening shadows phase separation in thin films.

Development of Theory for Bulk Polymer-Blend Systems.- Development of Theory for Polymer-Blend Thin Films.- Hamiltonian Phase Portraits for Polymer-Blend Thin Films.- Lateral Phase Separation via Surface Bifurcation.- Coupled Surface Roughening and Phase Separation.

Erscheint lt. Verlag 27.6.2015
Reihe/Serie Springer Theses
Zusatzinfo XVI, 171 p. 60 illus., 11 illus. in color.
Verlagsort Cham
Sprache englisch
Maße 155 x 235 mm
Themenwelt Naturwissenschaften Physik / Astronomie Atom- / Kern- / Molekularphysik
Naturwissenschaften Physik / Astronomie Festkörperphysik
Schlagworte 3D Dewetting Model • Dewetting Coupled to Phase Separation • Diffusion Simulations of Polymer Films • Hamiltonian Phase Portraits • Phase Equilibria of Polymer Films • Phase Portraits of Polymer Films • Phase Separation in Polymer-blend Thin Films • Roughening of Polymer-blend Thin Films • Thermodynamics of Polymer Films • Thin Film Morphology
ISBN-10 3-319-19398-8 / 3319193988
ISBN-13 978-3-319-19398-4 / 9783319193984
Zustand Neuware
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