Polymer vs Solvent Diagram of Film Structures Formed in Spin-Cast Poly(3-alkylthiophene) Blends

Jaczewska, JustynaInstitute of Physics, Jagiellonian University, Krakow, Poland (författare)

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).

Budkowski, AndrzejM. Smoluchowski Insitute of Physics, Jagiellonian University, Reymonta 4, Krakow 30–059, Poland (författare)
Bernasik, AndrzejFaculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, Krakow 30–059, Poland (författare)
Moons, Ellen,1966-Karlstads universitet,Avdelningen för fysik och elektroteknik,Materialvetenskap,Materialfysik(Swepub:kau)ellemoon (författare)
Rysz, JakubM. Smoluchowski Insitute of Physics, Jagiellonian University, Reymonta 4, Krakow 30–059, Poland (författare)
Institute of Physics, Jagiellonian University, Krakow, PolandM. Smoluchowski Insitute of Physics, Jagiellonian University, Reymonta 4, Krakow 30–059, Poland (creator_code:org_t)

Ingår i:MacromoleculesWashington : American Chemical Society41, s. 4802-48100024-92971520-5835

Av författaren/redakt...: Jaczewska, Justy ...; Budkowski, Andrz ...; Bernasik, Andrze ...; Moons, Ellen, 19 ...; Rysz, Jakub

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