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  • Studium vlastností poly[methyl(phenyl)silylenu] (PMPSi) bylo založeno na měření intenzity katodoluminiscence (CL) po průchodu vzorkem. Hlavním úskalím studia je náchylnost materiálu k degradaci elektronovým svazkem. Degradace PMPSi do značné míry snižuje CL intenzitu (pokles na 40% po pěti minutách excitace). Proto bylo použito měření v synchronním módu, které eliminuje vliv pozadí a šumu. Interakce elektronů s PMPSi způsobuje postupné štěpní slabých Si - Si vazeb základního Si řetězce a vede k tvorbě silylenových radikálů. Možnost celá řady následných reakcí radikálů komplikuje samotný proces degradace. Bylo zjištěno, že degradačního proces je částečně vratný. Částečné obnovení CL intenzity bylo přisouzeno zpětné reakci radikálů, kdy byl materiál ponechán po dobu 20 hodin ve vakuu při teplotě okolí. Porozumění fyzikálních a chemických mechanismů degradace a vratného procesu CL emise PMPSi je zajímavé jak z vědeckého tak aplikačního hlediska. (cs)
  • The study of the properties of poly[methyl(phenyl)silylene] (PMPSi) was based on the measurement of intensity of the cathodoluminescent (CL) emission after passing through the specimen. The major problem of the study is the susceptibility of the material investigated to the degradation by electron beam. PMPSi degradation strongly decreases the CL intensity (to 40% after five minutes from the beginning of the excitation). Therefore, the measurement in the synchronous mode was used to eliminate the influence of the background and of the noise. An interaction of electrons with PMPSi causes the progressive scission of weak Si - Si bonds in the main chain of the material and leads to the formation of silyl radicals. A series of subsequent reactions of the radicals is possible, which complicates the process of degradation. It was found that the degradation process is partly reversible.
  • The study of the properties of poly[methyl(phenyl)silylene] (PMPSi) was based on the measurement of intensity of the cathodoluminescent (CL) emission after passing through the specimen. The major problem of the study is the susceptibility of the material investigated to the degradation by electron beam. PMPSi degradation strongly decreases the CL intensity (to 40% after five minutes from the beginning of the excitation). Therefore, the measurement in the synchronous mode was used to eliminate the influence of the background and of the noise. An interaction of electrons with PMPSi causes the progressive scission of weak Si - Si bonds in the main chain of the material and leads to the formation of silyl radicals. A series of subsequent reactions of the radicals is possible, which complicates the process of degradation. It was found that the degradation process is partly reversible. (en)
Title
  • Degradation of Poly[methyl(phenyl)silylene] cathodoluminescence
  • Degradation of Poly[methyl(phenyl)silylene] cathodoluminescence (en)
  • Degradace katodoluminiscence poly[methyl(phenyl)silylenu] (cs)
skos:prefLabel
  • Degradation of Poly[methyl(phenyl)silylene] cathodoluminescence
  • Degradation of Poly[methyl(phenyl)silylene] cathodoluminescence (en)
  • Degradace katodoluminiscence poly[methyl(phenyl)silylenu] (cs)
skos:notation
  • RIV/68081731:_____/05:00022833!RIV06-AV0-68081731
http://linked.open.../vavai/riv/strany
  • 311;319
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(AV0Z20650511)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 517152
http://linked.open...ai/riv/idVysledku
  • RIV/68081731:_____/05:00022833
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • degradation; metastability; cathodoluminescence (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [4AA07F80DF98]
http://linked.open...v/mistoKonaniAkce
  • Gothenburg
http://linked.open...i/riv/mistoVydani
  • Pfinztal
http://linked.open...i/riv/nazevZdroje
  • 2nd European Weathering Symposium on Natural and Artificial Ageing of Polymers
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Horák, Petr
  • Schauer, Petr
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • Gesellschaft für Umweltsimulation GUS
https://schema.org/isbn
  • 3-9808382-9-3
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