Surface states and the contact electrification of polymers

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Abstract
An experimental method is described for determining whether or not extrinsic surface states dominate the contact electrification of polymers; by 'extrinsic' surface states any kind of surface state which is not present on a freshly prepared surface of the polymer is meant. The experiments show conclusively that extrinsic surface states do not contribute to the contact electrification of polytetrafluoroethylene. In all probability, they are similarly unimportant in polyethyleneterephthalate, polyvinylchloride and polypropylene. On the other hand, the contact electrification of polyethylene is normally dominated by surface states which are formed when the polymer is exposed to the atmosphere.

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