We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Reaction-driven solvent transport in UV-curable phase-separating coatings.
- Authors
Yamamura, M.
- Abstract
We experimentally examined the time-evolutions of local compositions in photocurable, monomer-solvent-initiator ternary liquid film coatings using attenuated total-reflectance-Fourier transform infrared spectroscopy. The coatings exhibited phase separation upon UV exposure owing to the inherent partial miscibility between the solvent and the polymer. The solvent concentration at the bottom of the coating increased when exposed to UV light for 1 s from the top, showing a solvent transport along the irradiation direction. The differences in solvent concentration before and after UV exposure showed good agreement with model predictions based on stress-induced non-Fickian solvent mass transport. The solvent concentrations at the bottom remained constant in the case of discrete phase structures, whereas it exponentially decayed over time in bicontinuous phase structures. These results suggest that light-tunable microstructures enable the relaxation of the reaction-driven nonuniformity in solvent concentration distributions.
- Subjects
SOLVENTS; IRRADIATION; LIQUID films; SURFACE coatings; PHASE separation; INFRARED spectroscopy
- Publication
Journal of Coatings Technology & Research, 2023, Vol 20, Issue 1, p15
- ISSN
1945-9645
- Publication type
Article
- DOI
10.1007/s11998-022-00661-7