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Beitrag zur Herstellung flexibler EC Mehrschichtsysteme auf Polycarbonatsubstrat und deren Weiterverarbeitung im Spritzprägeprozess
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Electrochromic (EC), dimmable glass panes for heat and glare protection in buildings, often referred to as smart windows, are commercially available, as are self-darkening rear-view mirrors or windows in aircraft cabins. These systems are still characterized by their high price and glass as a carrier material. Plastic-based applications such as visors, ski goggles and car windows, which require low weight, three-dimensional geometry and high-throughput production, are not yet available on the market. To produce such EC devices (ECDs), a flexible EC film could be back-injected with plastic melt in an injection molding process and further processed into compact 3D geometries in a single automated step with low processing time. For this purpose, a flexible EC film with indium tin oxide (ITO)-coated polycarbonate (PC) film as a transparent conductive electrode (TCE) and flexible polymer electrolyte is produced and this ECD and its components are first characterized in detail. The carrier material PC, which is a high-quality engineering plastic, is particularly suitable for transparent applications due to its optical and mechanical properties. Most of the systems described in the literature are based on a PET/ITO substrate, which is commercially available. Considering the expected process-related thermomechanical stresses during the processing of the EC film in the injection moulding process, the resistance of the PC/ITO-TCE under variation of the ITO layer thickness under thermal and thermomechanical stress is investigated and the influence of back injection moulding on the properties is characterized. In a second step, the flexible EC film is back-injected as a complete system using the injection compression molding process. Due to its key role in the electrochemical system, particular focus is also placed on the elastomeric gel electrolyte with polyurethane matrix used, which has been shown to be advantageous in preliminary work. The curing behavior and the influence of the proportion of solvent and conducting salt on the ionic conductivity as well as the optical and mechanical properties are being investigated. Furthermore, the resistance of the electrolyte to artificial weathering at 25/50 °C and 50 % relative humidity in air and at 25 °C in a dry nitrogen atmosphere, in each case with and without UV irradiation, is investigated as a function of the amount of conducting salt and solvent.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09783737612067
- Genre Technik
- Lesemotiv Verstehen
- Größe H210mm x B9mm x T148mm
- EAN 9783737612067
- Titel Beitrag zur Herstellung flexibler EC Mehrschichtsysteme auf Polycarbonatsubstrat und deren Weiterverarbeitung im Spritzprägeprozess
- Autor Christopher Johannes
- Gewicht 210g
- Herausgeber kassel university press
- Anzahl Seiten 156
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