Variation of Current-Density as a Function of Electric-Field Intensity in Synthetic Nanoclay-filled Polypropylene

Document Type

Conference Proceeding

Publication Date


Publication Title

IEEE Xplore

Conference Name

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena


Within the scope of this study variation of current-density with electric-field intensity is studied in polypropylene filled with 0% (plain polypropylene), 2%, 4% and 8% synthetic nano-clay by weight. While recording the rms voltage and current, the power-frequency voltage (60Hz) was raised across each specimen at a speed of 226 V/s. In order to see the reproducibility of the results, 5 samples, with the same nano-clay concentration, were subjected tests under the same conditions. Each specimen under test revealed that the current-density varied non-linearly with the electric-field intensity. Moreover, some degree of saturation was observed at relatively higher electric fields in all the specimens. The saturation of the synthetic-clay loaded nanocomposite started at higher electric fields than the plain polypropylene. Up to a critical electric field intensity the capacitance of the materials was found to be almost constant, but for the electric fields higher than the critical electric field, the material behaves non-linearly leading to a dramatic reduction in capacitance.


Cancun, Mexico

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