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The electrical conductivities of polyethylene, polypropylene and related fluorinated polymers such as polytetrafluoroethylene and fluorinated ethylene propylene copolymer were measured using a corona electrode. The polarity of the dominant carriers making the greatest contribution to the current changed from negative to positive as the ratio of fluorine atoms to hydrogen atoms was increased. Electronegative fluorine atoms were concluded to provide deep trap sites for negative carriers and to suppress the current due to negative carriers. The results of surface potential decays and TSC's of corona-charged specimens also supported the above conclusion.
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Mizutani et al. (1985) studied this question.
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