Determination of Polyethylene Terephthalate Sheet Superstructure by Corrosion Technique in High-frequency Plasmas. Influence of Generator Output and Gas Pressure.

The flow of positive ions from high-frequency plasmas was implemented to corrode the surface of polyethylene terephthalate sheets in an attempt to examine their superstructure. Experiments with this technique showed that corrosion became less selective with increasing output of the high-frequency generator. The influence of gas pressure on ion energy was also investigated. The results thus obtained were used to establish optimum conditions for plasma generation. The method has proved efficient in revealing crystalline and amorphous zones in the structure of the plastics sheets studied.