Influence of Charge Density on Charge Decay in Chemically Modified Polypropylene Films
- Previous work has shown that surface modification with orthophosphoric acid can significantly enhance the charge stability on polypropylene (PP) surface by generating deeper traps. In the present study, thermally stimulated potential-decay measurements revealed that the chemical treatment may also significantly increase the number of available trapping sites on the surface. Thus, as a consequence, the so-called "cross-over" phenomenon, which is observed on as-received and thermally treated PP electrets, may be overcome in a certain range of initial charge densities. Furthermore, the discharge behavior of chemically modified samples indicates that charges can be injected from the treated surface into the bulk, and/or charges of opposite polarity can be pulled from the rear electrode into the bulk at elevated temperatures and at the high electric fields that are caused by the deposited charges. In the bulk, a lack of deep traps causes rapid charge decay already in the temperature range around 95 degrees C.
| Author details: | Jingwen WangORCiD, Dmitry RychkovORCiD, Reimund GerhardORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1109/ICD.2018.8514718 |
| ISBN: | 978-1-5386-6389-9 |
| Title of parent work (English): | 2018 IEEE 2nd International Conference on Dielectrics (ICD) |
| Publisher: | IEEE |
| Place of publishing: | New York |
| Publication type: | Other |
| Language: | English |
| Date of first publication: | 2018/11/01 |
| Publication year: | 2018 |
| Release date: | 2022/03/17 |
| Tag: | chemical modification; cross-over effect; polypropylene; surface charge stability; thermally stimulated discharge |
| Number of pages: | 4 |
| Funding institution: | European UnionEuropean Union (EU) |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer review: | Referiert |
