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The Contact Electrification of Polymers and the Depth of Charge Penetration Measurements of contact electrification have been made on polymer films charge.

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Polymers were slid on rough, hard surfaces with normal loads which caused full penetration (real and apparent areas equal) and partial penetration (real less.

This figure clearly shows that the oxygen diffusion into the bulk of the polymer is dependent on the treatment time. The oxygen penetration depth is estimated to 8, 9, 10, and higher than 10 nm for the films treated during 5, 10, 30, and 60 s, respectively.

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