Study of Argon Plasma Treatment of Polycarbonate Substrate

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Authors

ZAJÍČKOVÁ Lenka SUBEDI Deepak Prasad BURŠÍKOVÁ Vilma VELTRUSKÁ Kateřina

Year of publication 2003
Type Article in Periodical
Magazine / Source Acta physica slovaca
MU Faculty or unit

Faculty of Science

Citation
Field Plasma physics
Keywords plasma treatment; polycarbonate
Description Results of polycarbonate plasma treatment in argon r.f. glow discharges as concern the chem- ical structure and surface free energy are presented. The oxygen-to-carbon ratio increased after the treatment indicating an increase of oxygen containing functional groups on the polycarbonate surface. Small amount of silicon as a result of previous depositions of organosilicon thin films in the same reactor and small amount of nitrogen coming probably from an exposure of the reactive surface to the atmosphere were found on the surface. The surface free energy increased after the treatment from the original value of 35 mJ/m2 to 63-74 mJ/m2. Effect of treatment time, gas flow rate, pressure and aging on the surface free energy was studied too. In order to study an improvement of adhesion between the polycarbonate and an additional coatings the organosilicon thin films were deposited on the untreated and plasma treated polycarbonate. The interfacial fracture resistance of such a system was qualitatively tested by "cross-hatch peel test". The initiation and propagation stage of the fracture were studied by depth sensing indentation method followed by an observation of the samples with an optical microscope.
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