Fine-tuning the structure of stimuli-responsive polymer films by hydrostatic pressure and temperature
The response of stimuli-responsive polymer brushes to moderately elevated pressure is investigated by neutron reflectivity and a thermodynamically consistent density functional theory where pressure effects are included by a hydrophobic cavity model. Evidence is provided that temperature and pressur...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
August 12, 2013
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| In: |
Macromolecules
Year: 2013, Jahrgang: 46, Heft: 16, Pages: 6541-6547 |
| ISSN: | 1520-5835 |
| DOI: | 10.1021/ma400962p |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/ma400962p Verlag, lizenzpflichtig, Volltext: https://pubs.acs.org/doi/10.1021/ma400962p 
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| Verfasserangaben: | Matthias Reinhardt, Joachim Dzubiella, Marcus Trapp, Philipp Gutfreund, Martin Kreuzer, André H. Gröschel, Axel H.E. Müller, Matthias Ballauff, and Roland Steitz |
| Zusammenfassung: | The response of stimuli-responsive polymer brushes to moderately elevated pressure is investigated by neutron reflectivity and a thermodynamically consistent density functional theory where pressure effects are included by a hydrophobic cavity model. Evidence is provided that temperature and pressure effects on the brush spatial structure are entirely antagonistic. A ∼100 bar/K cancellation effect is found, which we argue is a general feature for hydrophobically associating homopolymers and serves for experimental guidance and fine-control of polymer film structure. Our results also suggest that polymeric interfaces which do not show a marked temperature dependence are also rather insensitive to pressure effects for applied pressures below 1 kbar. |
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| Beschreibung: | Gesehen am 10.01.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1520-5835 |
| DOI: | 10.1021/ma400962p |