Wettability of polymer housings of electronic components treated by non-equilibrium gaseous plasmaPRODANOVIĆ, JELENA (Avtor) Gyergyek, Tomaž (Mentor) Mozetič, Miran (Komentor) plasmapolypropylenewettabilitypolymersElectronic components are usually embedded in polymer housings and impregnated with two-component liquid polymers, which are cured to protect the components from degradation. The wettability of the polymer housing is inadequate; it should be modified by treatment with gaseous plasma. The surface finish of the housing depends on plasma parameters. Two-stage processing was examined. The housings made from polypropylene blends were first exposed to a gaseous plasma sustained by inductively coupled radio-frequency discharge in the active discharge mode (also called inductive coupling or H-mode). The housings were then processeded with a flowing afterglow mode of oxygen plasma. The hypothesis is that the first treatment using plasma in the H-mode causes the formation of dangling bonds, which are then occupied by oxygen atoms to form polar functional groups and thus cause optimal wettability. The first treatment was performed at two pressures and three gases (hydrogen, nitrogen, and air) for a second. The second treatment was performed at different fluences of neutral oxygen atoms. The wettability was determined by a sessile-drop method. The correlation between the fluence of O-atoms and surface wettability was drawn. The hypothesis about the existence of the optimal range of fluences, where the wettability is optimal, was confirmed. The quantification of the hypothesized surface wettability versus the fluence of O-atoms is the major contribution to the science of plasma-surface interaction.20222022-06-22 13:25:00Magistrsko delo/naloga137578sl