Abstract
In the search of voltage stabilizers for high voltage underground cables the chemical synthesis and electrical tree inhibiting effect of a series of thioxanthone derivatives in cross-linked low-density polyethylene (XLPE) is reported. The strongest increase in electrical tree initiation field under high-voltage alternating current (HVAC) conditions was 55% compared to reference XLPE after the addition of 0.3 wt% 9-oxo-9H-thioxanthen-2-yl methacrylate. Thermal analysis, small angle X-ray scattering and gel content measurements showed that the addition of the stabilizers did not significantly influence the microstructure and gel fraction of XLPE. A comparison between the stabilizing effects of the thioxanthone derivatives and previously reported photophysical properties revealed that a short lifetime of the triplet excited state can be related to a good voltage-stabilizing effect.
Original language | English |
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Pages (from-to) | 63-69 |
Number of pages | 7 |
Journal | Polymer Degradation and Stability |
Volume | 112 |
DOIs | |
Publication status | Published - Feb 2015 |
Keywords
- Electrical treeing
- High voltage insulation
- Polyethylene
- Polymer degradation
- Thioxanthones