プラズマによるポリエチレンの表面構造の変化と電気伝導

抄録

High-density polyethylene films of 50μm thick were treated in a down-stream plasma of rf glow discharge of argon, hydrogen, or oxygen gas. It is found that many transvinylene and unreacted radicals remain after argon or hydrogen plasma treatment, and that carbonyl groups are formed by oxygen plasma treatment.
Conduction current is smaller in the hydrogen-plasma treated samples and the samples exposed by oxygen or ozone after hydrogen-plasma treatment than the untreated samples. As for this reason, thermal-pulse-current measurements indicate that the treated surface layer traps electrons or holes and reduces field strength at the electrode surface, thus suppressing further injection of electrons or holes.