The charge trapping properties were studied by Thermally Stimulated Depolarization Current (TSDC) measurements. The obtained TSDC results show significant differences in charge trapping properties of PP/POE composites filled with differently modified silicas. Polar functional groups attached to the surface of the silica appear to have a strong effect on the charge trapping properties: The trap depth distribution becomes deeper and the trap density decreases to significantly lower levels.
All results show that incorporation of surface modified nanosilica into a PP/POE matrix is a promising approach to tailor its dielectric properties. Further development of these composites may lead to benefits for application in high-voltage cable and capacitor applications.
Keywords: silica surface modification, dry silanization, charge trapping, PP, POE, TSDC, high voltage cable.
|Number of pages||5|
|Publication status||Published - 12 Jun 2019|
|Event||26th Nordic Insulation Symposium on Materials, Components and Diagnostics - Tampere, Finland|
Duration: 11 Jun 2019 → 13 Jun 2019
Conference number: 26
|Conference||26th Nordic Insulation Symposium on Materials, Components and Diagnostics|
|Abbreviated title||NORD-IS 2019|
|Period||11/06/19 → 13/06/19|
- silica surface modification
- dry silanization
- charge trapping
- high voltage cable