Summary
Photoelectron spectroscopic examination of treated plastic surfaces showed that surface oxidation, primarily as carboxyl groups, was responsible for formation of good growth surfaces. Gas-plasma studies indicated that only very short exposures were required and that the effect was confined to a thin surface layer that produced adhesive surfaces. Highly adhesive surfaces were produced using oxidizing chemicals. Studies with a polymeric ester demonstrated the importance of unesterified carboxyl groups for high adhesiveness.
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