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- W4200320551 abstract "Water-based polymer coatings usually exhibit poor adhesion performance compared to their solvent-based counterparts. Unveiling the difference in interface structures between water-based and solvent-based polymer coatings will help to improve the adhesion performance of water-based polymer coatings. Herein, sum frequency generation (SFG) vibrational spectroscopy was utilized to detect the buried interfaces of water-based and solvent-based polymer coatings. Water-based poly(methyl methacrylate) (PMMA) coatings containing sodium dodecyl sulfate (SDS) as an emulsifier and solvent-based PMMA coatings using toluene as solvent were selected as the model systems for this investigation. The results demonstrate that the interface between water-based PMMA and silica substrate is mainly occupied by SDS and water molecules, and the polymer chains show random-coil conformations due to their encapsulation by SDS. In contrast, for the solvent-based PMMA, the PMMA chains directly contact the silica substrate and exhibit stretched chain conformations at the interface. The interface structure of water-based PMMA coatings can be improved by annealing at Tg + 70 ℃ to form an adsorbed polymer layer. This work reveals the origin of the difference in the adhesion strength of water-based and solvent-based polymer coatings at the molecular level, which is significant for the design and performance optimization of water-based polymer coatings." @default.
- W4200320551 created "2021-12-31" @default.
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- W4200320551 date "2022-03-01" @default.
- W4200320551 modified "2023-10-16" @default.
- W4200320551 title "Understanding the interface structures of water-based and solvent-based poly(methyl methacrylate) coatings at the molecular level" @default.
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- W4200320551 doi "https://doi.org/10.1016/j.apsusc.2021.152239" @default.
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