Symmetric polymer blend confined into a film with antisymmetric surfaces: Interplay between wetting behavior and the phase diagram
We study the phase behavior of a symmetric binary polymer blend that is confined in a thin film. The film surfaces interact with the monomers via short-range potentials. We calculate the phase behavior within the self-consistent field theory of Gaussian chains. Over a wide range of parameters we fin...
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| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/126424 |
| Aporte de: |
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I19-R120-10915-126424 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física phase behavior symmetric binary polymer field theory Gaussian chains antisymmetric surfaces |
| spellingShingle |
Ciencias Exactas Física phase behavior symmetric binary polymer field theory Gaussian chains antisymmetric surfaces Müller, Marcus Albano, Ezequiel Vicente Binder, Kurt Symmetric polymer blend confined into a film with antisymmetric surfaces: Interplay between wetting behavior and the phase diagram |
| topic_facet |
Ciencias Exactas Física phase behavior symmetric binary polymer field theory Gaussian chains antisymmetric surfaces |
| description |
We study the phase behavior of a symmetric binary polymer blend that is confined in a thin film. The film surfaces interact with the monomers via short-range potentials. We calculate the phase behavior within the self-consistent field theory of Gaussian chains. Over a wide range of parameters we find strong first-order wetting transitions for the semi-infinite system, and the interplay between the wetting/prewetting behavior and the phase diagram in confined geometry is investigated. Antisymmetric boundaries, where one surface attracts the A component with the same strength as the opposite surface attracts the B component, are applied. The phase transition does not occur close to the bulk critical temperature but in the vicinity of the wetting transition. For very thin films or weak surface fields one finds a single critical point at straight φ<sub>c</sub> = ½. For thicker films or stronger surface fields the phase diagram exhibits two critical points and two concomitant coexistence regions. Only below a triple point there is a single two-phase coexistence region. When we increase the film thickness the two coexistence regions become the prewetting lines of the semi-infinite system, while the triple temperature converges toward the wetting transition temperature from above. The behavior close to the tricritical point, which separates phase diagrams with one and two critical points, is studied in the framework of a Ginzburg-Landau ansatz. Two-dimensional profiles of the interface between the laterally coexisting phases are calculated, and the interfacial and line tensions analyzed. The effect of fluctuations and corrections to the self-consistent field theory are discussed. |
| format |
Articulo Articulo |
| author |
Müller, Marcus Albano, Ezequiel Vicente Binder, Kurt |
| author_facet |
Müller, Marcus Albano, Ezequiel Vicente Binder, Kurt |
| author_sort |
Müller, Marcus |
| title |
Symmetric polymer blend confined into a film with antisymmetric surfaces: Interplay between wetting behavior and the phase diagram |
| title_short |
Symmetric polymer blend confined into a film with antisymmetric surfaces: Interplay between wetting behavior and the phase diagram |
| title_full |
Symmetric polymer blend confined into a film with antisymmetric surfaces: Interplay between wetting behavior and the phase diagram |
| title_fullStr |
Symmetric polymer blend confined into a film with antisymmetric surfaces: Interplay between wetting behavior and the phase diagram |
| title_full_unstemmed |
Symmetric polymer blend confined into a film with antisymmetric surfaces: Interplay between wetting behavior and the phase diagram |
| title_sort |
symmetric polymer blend confined into a film with antisymmetric surfaces: interplay between wetting behavior and the phase diagram |
| publishDate |
2000 |
| url |
http://sedici.unlp.edu.ar/handle/10915/126424 |
| work_keys_str_mv |
AT mullermarcus symmetricpolymerblendconfinedintoafilmwithantisymmetricsurfacesinterplaybetweenwettingbehaviorandthephasediagram AT albanoezequielvicente symmetricpolymerblendconfinedintoafilmwithantisymmetricsurfacesinterplaybetweenwettingbehaviorandthephasediagram AT binderkurt symmetricpolymerblendconfinedintoafilmwithantisymmetricsurfacesinterplaybetweenwettingbehaviorandthephasediagram |
| bdutipo_str |
Repositorios |
| _version_ |
1764820450657959937 |