Electret Properties of Polyetherimides: Influence of Water Content and Comparison with Other High-Temperature Polymer Films
| Autor: | Hans-Werner Schmidt, Reiner Giesa, Deliani Lovera, Volker Altstädt, Thomas Frese, Goy Teck Lim, Jan K.W. Sandler |
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| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Absorption of water Materials science Polymers and Plastics Annealing (metallurgy) General Chemical Engineering Organic Chemistry Concentration effect Polymer Polyetherimide Amorphous solid chemistry.chemical_compound chemistry Chemical engineering Polymer chemistry Materials Chemistry Electret Polyimide |
| Zdroj: | Macromolecular Materials and Engineering. 292:582-587 |
| ISSN: | 1438-7492 |
| DOI: | 10.1002/mame.200600463 |
| Popis: | In this comparative study, the charge storage performance of commercial high-temperature polymer films was evaluated and correlated with their chemical structure. Isothermal surface potential decay measurements after annealing periods at 90°C revealed that amorphous polyetherimide (PEI) films showed the best charge storage behavior. Polyimide films showed reduced charge storage performance, whereas sulfur-containing polymer films are not suitable as electrets due to their fast charge decay. Additionally, the effect of water content in PEI films in the range of 0.02-0.79 wt.-% was studied. Increasing amounts of water decreased the charge storage properties proportionally, but only by a relatively smaller amount: the highest investigated water content of 0.79 wt.-% reduced the charge by only 30%. |
| Databáze: | OpenAIRE |
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