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UV-LEDs - a new tool to determine the spectral response

  • To determine a polymer’s spectral response of photo degradation, two main methods have been established. The so-called “filter technique” uses polychromatic radiation, which is filtered by a set of various sharp cut-on filters. This procedure provides separated reading points of an activation spectrum of the investigated material. With the "spectrographic technique” a specimen is irradiated with pectrally dispersed radiation, locally quasi monochromatically, and the local property changes.are related to the radiant exposure at the respective wavelengths. A third method, the irradiation of specimens with quasi monochromatic radiation behind interference filters, is rarely used. These methods have advantages and disadvantages and therefore, there are limits for conclusions from these spectral data. Concerning the quasi monochromatic Irradiation of specimens the development of new UV radiation sources looks promising. With the rapid development of inexpensive UV Light-emitting diodesTo determine a polymer’s spectral response of photo degradation, two main methods have been established. The so-called “filter technique” uses polychromatic radiation, which is filtered by a set of various sharp cut-on filters. This procedure provides separated reading points of an activation spectrum of the investigated material. With the "spectrographic technique” a specimen is irradiated with pectrally dispersed radiation, locally quasi monochromatically, and the local property changes.are related to the radiant exposure at the respective wavelengths. A third method, the irradiation of specimens with quasi monochromatic radiation behind interference filters, is rarely used. These methods have advantages and disadvantages and therefore, there are limits for conclusions from these spectral data. Concerning the quasi monochromatic Irradiation of specimens the development of new UV radiation sources looks promising. With the rapid development of inexpensive UV Light-emitting diodes (LEDs), new : sources of nearly monochromatic radiation in the UV ränge are available, even down to about 250 nm. To determine the spectral response, the use of such UV-LEDs in TO-18 ) and TO-39 metal cases combines the advantages of low cost and energy efficiency, stable spectral irradiance, temperature.and humidity control, larger specimen areas, and an easy and stable analysis. Combinations of different UV LEDs are also discussed as replacement for xenon arc ' radiation sources, see patent application EP01528388A1.zeige mehrzeige weniger

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Autor*innen:Anja Geburtig, Anja KömmlingORCiD, Volker WachtendorfORCiD
Persönliche Herausgeber*innen:T. Reichert
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):5th European weathering symposium - Natural and artificial ageing of polymers
Jahr der Erstveröffentlichung:2011
Herausgeber (Institution):CEEES (Confederation of European Environmental Engineering Societies)
Verlag:GUS (Gesellschaft für Umweltsimulation)
Verlagsort:Pfinztal
Ausgabe/Heft:15
Erste Seite:77
Letzte Seite:86
Freie Schlagwörter:Action spectrum; Spectral sensitivity; UV resistance; UV-LEDs; Weathering
Veranstaltung:5th European weathering symposium - Natural and artificial ageing of polymers
Veranstaltungsort:Lisbon, Portugal
Beginndatum der Veranstaltung:21.09.2011
Enddatum der Veranstaltung:23.09.2011
ISBN:978-3-9813136-2-8
Bemerkung:
Serientitel: CEEES Publication – Series title: CEEES Publication
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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