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- Title
Kinetics of Surface Wettability of Aromatic Polymers (PET, PS, PEEK, and PPS) upon Treatment with Neutral Oxygen Atoms from Non-Equilibrium Oxygen Plasma.
- Authors
Vesel, Alenka; Zaplotnik, Rok; Primc, Gregor; Mozetič, Miran
- Abstract
The wettability of polymers is usually inadequate to ensure the appropriate spreading of polar liquids and thus enable the required adhesion of coatings. A standard ecologically benign method for increasing the polymer wettability is a brief treatment with a non-equilibrium plasma rich in reactive oxygen species and predominantly neutral oxygen atoms in the ground electronic state. The evolution of the surface wettability of selected aromatic polymers was investigated by water droplet contact angles deposited immediately after exposing polymer samples to fluxes of oxygen atoms between 3 × 1020 and 1 × 1023 m−2s−1. The treatment time varied between 0.01 and 1000 s. The wettability evolution versus the O-atom fluence for all aromatic polymers followed similar behavior regardless of the flux of O atoms or the type of polymer. In the range of fluences between approximately 5 × 1020 and 5 × 1023 m−2, the water contact angle decreased exponentially with increasing fluence and dropped to 1/e of the initial value after receiving the fluence close to 5 × 1022 m−2.
- Subjects
OXYGEN plasmas; NONEQUILIBRIUM plasmas; WETTING; POLYMERS; REACTIVE oxygen species; ATOMS; LIQUID-liquid equilibrium
- Publication
Polymers (20734360), 2024, Vol 16, Issue 10, p1381
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym16101381