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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ritamäki, Mikael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2019Steering Capacitor Film Development with Methods for Correct and Adequate Dielectric Performance Assessment
- 2018Compounding, Structure and Dielectric Properties of Silica-BOPP Nanocomposite Filmscitations
- 2018Short-Term Dielectric Performance Assessment of BOPP Capacitor Films: A Baseline Studycitations
- 2017The Role of Film Processing in the Large-Area Dielectric Breakdown Performance of Nano-Silica-BOPP Filmscitations
- 2017Polypropylene/SIO2 nanocomposite with improved dielectric properties for DC cables
- 2017Large-area approach to evaluate DC electro-thermal ageing behavior of BOPP thin films for capacitor insulation systemscitations
- 2016Differences in AC and DC large-area breakdown behavior of polymer thin filmscitations
- 2016Dielectric breakdown properties of mechanically recycled SiO2-BOPP nanocompositescitations
- 2015DC ramp rate effect on the breakdown response of SiO2-BOPP nanocompositescitations
- 2015Effects of thermal aging on the characteristic breakdown behavior of nano-SiO2-BOPP and BOPP filmscitations
- 2015The role of film processing in the large-area dielectric breakdown performance of nano-silica-BOPP filmscitations
Places of action
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article
Large-area approach to evaluate DC electro-thermal ageing behavior of BOPP thin films for capacitor insulation systems
Abstract
A large-area electro-thermal ageing test setup wasdeveloped and utilized to age several laboratory-scalebiaxially oriented polypropylene (BOPP)-hydrophobicsilica nanocomposite films. The films were aged in testcapacitors with self-healing metallized film electrodes,which enabled the ageing test to continue beyond thefirst breakdowns. Eight different films were aged for1000 hours under 100 V/µm DC stress at 75 °C, andlarge-area DC breakdown measurements, dielectricspectroscopy, gel permeation chromatography (GPC),differential scanning calorimetry (DSC) and dielectricspectroscopy were used to detect localized and bulkdegradation after the ageing period. The effects ofantioxidant contents, different PP grades and compounderscrew speed were evaluated. Material characterizationindicates no bulk degradation had occurred during ageing,which was associated with moderate temperature stress andinert nitrogen atmosphere. On the other hand, low-fieldbreakdowns (weak points) were observed in all but two ofthe aged materials, indicating that ageing was dominatedby localized degradation which may have introduced newbreakdown mechanisms. Weak points were also measured in asimilarly aged commercial capacitor-grade BOPP film agedat a lower field, supporting this conclusion. Theimportance of long-term characterization in materialdevelopment is demonstrated, and it is shown thatlong-term properties of the evaluated nanocomposites wereat least on the same level compared to neat BOPP films.