Surface treatment of monofilaments of polypropylene (PP), poly (ethylene terephthalate) (PET), and polyamide-6 (PA-6) was carried out by corona discharge. The process was conducted with an inter-electrode distance of 4 mm and treatment time in the range of 10 s to 120 s using a wire-plan system...

Surface treatment of monofilaments of polypropylene (PP), poly (ethylene terephthalate) (PET), and polyamide-6 (PA-6) was carried out by corona discharge. The process was conducted with an inter-electrode distance of 4 mm and treatment time in the range of 10 s to 120 s using a wire-plan system under controlled ambient conditions. The samples, before and after corona, were characterized through contact angle measurements, water absorption, Fourier transform infrared spectroscopy/attenuated total reflectance (FT-IR/ATR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). After corona, the PP, PET, and PA-6 samples showed water absorption degrees of 9.4%, 8.5%, and 9.1%, respectively. Meanwhile, their dynamic contact angles reduced by 29.6% (PP), 27.9% (PET), and 18.6% (PA-6), while their corresponding surface energies were 71.1 mJ/m(2), 77.4 mJ/m(2), and 75 mJ/m(2), respectively. The FT-IR/ATR, SEM, and DSC results showed that corona treatment effectively improves the wettability of polymeric surfaces through oxidation and surface morphology alteration, but does not affect the bulk thermal properties

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

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