Phase Diagram of 2D Poly(Ethylene Oxide)- block -Poly(Propylene Oxide)- block -Poly(Ethylene Oxide)─Poly(Dimethylsiloxane) Blends: A Combined Neutron Reflectometry and Sum Frequency Generation Study
Year: 2026
Type: article
Abstract: . PDMS-rich blends display a similar bilayer structure at all pressures, with the phase transition mainly involving thickening of the PDMS layer, as seen in pure PDMS films. SFG spectroscopy reveals that both polymers have distinct behavior in the blends and in pure films, due to either lateral or vertical interactions. Notably, despite their contrasting hydrophobicities, the polymers exhibit miscibility over a range of compositions and surface pressures, with evidence of attractive interactions. These findings underscore the unique behavior of confined polymer blends and the importance of 2D-specific phase diagrams for designing functional interfacial materials.
Source: Langmuir
Institutions: CY Cergy Paris Université, University of Vienna, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Laboratoire Léon Brillouin, Institut Laue-Langevin, Rutherford Appleton Laboratory, ISIS Neutron and Muon Source
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W7136246068