UV degradability of aryl-substituted polysilylenes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F05%3A63503764" target="_blank" >RIV/70883521:28110/05:63503764 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
UV degradability of aryl-substituted polysilylenes
Original language description
The susceptibility of aryl-substituted polysilylenes to photodegradation by UV radiation at two different degradation wavelength ? = 355 and 266 nm is examined on poly[methyl(phenyl)silylene] (PMPSi), poly[(biphenyl-4-yl)methylsilylene] (PBMSi) and copolymer poly-[methyl(phenyl)silylene{3(4)-[(2,4-dinitrophenylhydrazono)methyl]phenyl}methylsilylene] (PMPSi-DNPH). The photodegradation of PMPSi by UV radiation decreases the intensity of the exciton photoluminescence (PL) band. The temporal dependence is in accord with the idea of the scission of longer Si-Si segments at points of #weak bonds#. Both degradation wavelengths cause the creation of unsaturated bonds of different origin both forming metastable states, susceptible to anneal. In PBMSi and PMPSi-DNPH, the visible photoluminescence first decreased during the degradation by UV radiation, similarly to that as in PMPSi caused by the absorption decrease, but then the rise and saturation of PL was observed. The model for the observed t
Czech name
UV degradabilita aryl-substituovaných polysilylenů
Czech description
Příspěvek studuje odolnost aryl substituovaných polysilanů vůči fotodegradaci UV zářením. Je dokumentována úloha slabých vazeb v metastabilitě i degradačních procesech.
Classification
Type
D - Article in proceedings
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/1P05ME729" target="_blank" >1P05ME729: Study on synthesis and degradation processes in alkyl and aryl substituted polysilanes for aplication</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Natural and Arteficial Ageing of Polymers
ISBN
3-9808382-9-3
ISSN
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e-ISSN
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Number of pages
12
Pages from-to
297-308
Publisher name
Gesellschaft fuer Umweltsimulation e.V. GUS
Place of publication
Karlsruhe
Event location
Gothenburg, Sweden
Event date
Jun 16, 2005
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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