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Polymer vs Solvent Diagram of Film Structures Formed in Spin-Cast Poly(3-alkylthiophene) Blends
Institute of Physics, Jagiellonian University, Krakow, Poland.
M. Smoluchowski Insitute of Physics, Jagiellonian University, Reymonta 4, Krakow 30–059, Poland.
Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, Krakow 30–059, Poland.
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. Karlstad University, Faculty of Technology and Science, Materials Science. (Materialfysik)ORCID iD: 0000-0002-1609-8909
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2008 (English)In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 41, p. 4802-4810Article in journal (Refereed) Published
Abstract [en]

A polymer vs solvent diagram of film structures, formed in polystyrene (PS) blends (1:1 w:w PS/PT) with poly(3-alkylthiophenes) PT [regioregular R-P3DDT, R-P3HT and regiorandom P3BT, P3DDT] spincoated onto oxidized silicon surfaces from various common solvents [p-xylene, toluene, chloroform, chlorobenzene, cyclohexanone] is presented. The structures were determined with microscopic techniques (atomic, AFM and lateral, LFM, force microscopy, fluorescent microscopy FM) and dynamic secondary ion mass spectrometry (dSIMS). The diagram, arranged according to the solubility parameter of the PTs and the solvents, exhibits three main structural classes: dewetting, lamellar, and lateral (quasi-2-dim) morphology. Decrease in PT solubility parameter δPT inhibits dewetting of polymer films. It induces also a transition from lamellar to lateral film structure. Increase in solvent solubility parameter δS has similar effects. Such behavior is related to the stability of transient homogeneous films and multilayers in the course of spin-casting. The role of δPT and δS is elucidated based on the stability analysis performed in terms of spreading coefficient (dependent on δPT) and effective interfacial tension of solvent-rich polymer phase (dependent on δS).

Place, publisher, year, edition, pages
Washington: American Chemical Society , 2008. Vol. 41, p. 4802-4810
National Category
Condensed Matter Physics Polymer Chemistry
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-15762DOI: 10.1021/ma7022974OAI: oai:DiVA.org:kau-15762DiVA, id: diva2:571781
Available from: 2012-11-23 Created: 2012-11-23 Last updated: 2017-12-07Bibliographically approved

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