Charge decay on polymers subjected to ageing by partial discharges

✍ Scribed by Centurioni, L.; Guastavino, F.; Tiemblo, P.; Yang, G. M.; Sessler, G. M.

• Book ID: 101229311
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 333 KB
• Volume: 46
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199805)46:1<47::aid-pi984>3.0.co;2-d

✦ Synopsis

The decay of the surface potential of corona-charged 23È25 lm thick polyimide, polyethyleneterephthalate and polyetherimide samples, degraded by partial discharges, was determined. The samples were Ðrst subjected in their centre part to A.C. voltages by a sphereÈplane electrode system at relative humidities from 10 to 80%. This resulted in partial discharges and thus ageing of the samples. After various extents of ageing, the samples were corona charged over their entire area to a surface potential of about 250 V. The decay of the surface potential, measured with a scanning probe over periods of several days, was found to be more pronounced in the central, aged area and depended on the ageing extent and on the relative humidity at which the ageing was performed.

1998 SCI.