The Influence Of Ionic And Non-ionic Additives On The Electric Potential Distribution In Dielectric Liquids

Modifications of the electrostatic probe techniques of Forster [1,2] and of Bloor and Morant [ 3 ] have been used to study the influence of additives, including extended chain ions such as sodium dodecyl sulfate ( S D S ) and dissolved polymers, on the distribution of electric potential C#J(X) across low conductivity liquids between parallel electrodes. The systems studied include toluene with dissolved polystyrene and n-octanol with dissolved SDS. It is thought that these s stems reflect some of the conditions relevant to transrormer fluids and also may be of significance in biophysical considerations [ 4 ] . The distribution of space charge p(x) is estimated by the application of Poisson's equation to the measured potential function @(x). From such data implications can be made about the effects of molecular interactions.