Investigation of the Surface Dynamics of PET Treated by CF_4/CH_4 Plasmas IV. Application of Static State,Dynamic Contact Angle and Angle -dependent XPS Methods

The surface dynamic behaviors of PET modified by CF4/CH4 plasmas were investigated by static state, dynamic contact angle and X- ray photoelectron spectroscopy (XPS) techniques.lt was found that the hydrophobic characteristics of the modified PET surface decreased through water immersion. Decay constant k of Surface Dynamics of the modified surface can be calculated using the measurement results of the contact angle and the angle - dependent XPS, being a probe, k values can be used to characterize the surface dynamic behavior of the modified PET. Experiments proved that the CF4/CH4 plasmas show stronger hydrophobic effect than that of pure CF4 plasma alone.