Characterization of surface-modified pet films from industry

Abstract

Polyethylene terephthalate (PET) films from flexible packaging industry were modified by corona treatment in ambient atmosphere, production line speed 410, 210 and 150 m/min, with electrical power 6.7 and 9.0 KW, plasma treatment under vacuum with O2 and Ar, production line speed 600 m/min electrical power 4.0 KW, and chemical treatment with the amino resin compound. The equipment used in this study are attenuated total reflectance-Fourier transform infrared spectroscopy (ATR FT-IR) and Raman spectroscopy for analyzing chemical structures or functional groups such as O=C–O and C=O after modification, atomic force microscopy (AFM) for determining the nanotopographical changes on polymer surface, contact angle and dyne solution for determining the surface tension. After surface modification attenuated total reflectance-Fourier transform infrared spectroscopy (ATR FT-IR) and Raman spectroscopy can’t analyze the changes of chemical structures or functional groups due to the depth of modified surface not enough. However atomic force microscopy (AFM) observation showed the roughness changes, contact angle and dyne value showed the variation of surface tension.