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Titel: Platinum free thermally curable siloxanes for optoelectronic application – synthesis and properties
VerfasserIn: Steinbrück, Nils
Pohl, Svenja
Kickelbick, Guido
Sprache: Englisch
Titel: RSC Advances
Bandnummer: 9
Heft: 4
Seiten: 2205–2216
Verlag/Plattform: The Royal Society of Chemistry
Erscheinungsjahr: 2019
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Polysiloxanes for applications in the area of optical devices are usually based on two-component platinum catalysed cross-linked materials. Here we report the synthesis and properties of a novel one-component siloxane that can be thermally cured showing similar tailorable properties like commercially available encapsulation systems without using a noble metal catalyst. The pre-curing material is formed by an acid catalysed condensation reaction of trialkoxysilanes (TAS), dialkoxysilanes (DAS) and alkoxy-terminated polysiloxanes. NMR analysis of the formed polymeric compounds reveal that the materials are partially cross-linked gels. The obtained compounds can be thermally cured and consolidated at temperatures between 160 and 200 °C. Depending on the composition a tuneable hardness in between 50–90 Shore A, refractive indices of 1.494–1.505, as well as high temperature stabilities up to 443 °C were obtained. The high thermal- and photostability, the high transparency, as well as the tailorable refractive index makes these materials to ideal systems for optoelectronic applications. Investigations under increased temperatures and high-density illumination reveal that the material can withstand conditions, which are typical for high-performance light emitting diodes (LED).
DOI der Erstveröffentlichung: 10.1039/c8ra09801h
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-347128
hdl:20.500.11880/31773
http://dx.doi.org/10.22028/D291-34712
ISSN: 2046-2069
Datum des Eintrags: 21-Sep-2021
Bezeichnung des in Beziehung stehenden Objekts: Supplementary files
In Beziehung stehendes Objekt: https://www.rsc.org/suppdata/c8/ra/c8ra09801h/c8ra09801h1.pdf?_ga=2.173993379.1628629391.1632119547-124457788.1618394345
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Guido Kickelbick
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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