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Autor: Sam Coveney
ISBN-13: 9783319193984
Einband: Buch
Seiten: 171
Format: 244x162x15 mm
Sprache: Englisch
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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.
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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.
Autor: Sam Coveney
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.
Autor: Sam Coveney
ISBN-13:: 9783319193984
ISBN: 3319193988
Verlag: Springer, Berlin, Springer International Publishing, Springer
Seiten: 171
Sprache: Englisch
Auflage 2015
Sonstiges: Buch, 244x162x15 mm, 49 SW-Abb., 11 Farbabb.