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NOR and nitroxide-based HAS in accelerated photooxidation of carbon-chain polymers; comparison with secondary HAS: an ESRI and ATR FTIR study
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SYSNO ASEP 0359226 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title NOR and nitroxide-based HAS in accelerated photooxidation of carbon-chain polymers; comparison with secondary HAS: an ESRI and ATR FTIR study Author(s) Pilař, Jan (UMCH-V) RID, ORCID
Michálková, Danuše (UMCH-V)
Šeděnková, Ivana (UMCH-V) RID
Pfleger, Jiří (UMCH-V) RID
Pospíšil, Jan (UMCH-V)Source Title Polymer Degradation and Stability. - : Elsevier - ISSN 0141-3910
Roč. 96, č. 5 (2011), s. 847-862Number of pages 16 s. Language eng - English Country NL - Netherlands Keywords commodity carbon-chain polymers ; photodegradation ; accelerated weathering Subject RIV CD - Macromolecular Chemistry R&D Projects IAA400500804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000290078200016 DOI 10.1016/j.polymdegradstab.2011.02.004 Annotation Modern physical techniques were adopted for studies of spatial distribution of intermediates and products of photodegradation of four commodity polymers (polypropylene, polyethylene, polystyrene and poly(ethylene-co-norbornene)) stabilized with hindered amine stabilizer (HAS). HAS stabilization activity in polymers subjected to photooxidation is indicated by appearance of nitroxides. Concentration profiles of nitroxides inside polymer plaques subjected to accelerated weathering as a function of the weathering exposure time were determined by electron spin resonance imaging (ESRI). Stabilization activity of three alkoxyamine derivatives of HAS (Tinuvin®NOR 123, Tinuvin®NOR 371, Flamestab®NOR 116), Chimasorb®119 structurally similar to Flamestab®NOR 116, and nitroxide-based HAS Dastib®1045 was studied and compared with the secondary HAS Tinuvin®770. ESRI data were complemented by ATR FTIR detection of oxidation products and by diffusive optical transmittance of the polymer plaques. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2012
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