Studies of dielectric constant measurements and tribo-electric charging of pigmented polymer systems

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Abstract
Data are presented on the variation of the dielectric constant and the tribo-electric coefficient for a series of pigmented, melt mixed, polymer materials. Dielectric spectra are also presented for other pigmented polymeric materials. On the basis of these data it is shown that in certain situations a correlation may exist between the dielectric constant and the observed tribo-electric coefficient. A comparison of the values obtained with those predicted on the basis of the simple Wagner Model indicates that the dielectric increment can only be explained if a significant proportion of the material is present in a chained form. Model studies of carbon fibres are presented and a model for the prediction of the dielectric properties of chained carbon particles is also described.

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