Influence of Low-Temperature Atmospheric-Pressure Plasma on the Surface Chemistry of Polypropylene

Polypropylene (PP) is one of the most widely used polymers due to its performance properties. However, its low surface energy and chemical inertness limit the adhesion of PP to paints and adhesives. Treatment with low-temperature atmospheric- pressure plasma is an effective modification method that does not affect the bulk properties of the material. This article examines the mechanisms of low-temperature plasma interaction with the PP surface and the resulting changes in chemical composition, which are key to improving adhesion. The influence of processing parameters (type of plasma-forming gas and exposure time) on the introduction of functional groups and surface oxidation is analyzed.