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Encyclopedia of Polymer Composites: Properties, Performance and Applications
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SYSNO ASEP 0364888 Document Type M - Monograph Chapter R&D Document Type Monograph Chapter Title Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation/photostabilization of carbon chain polymers Author(s) Pilař, Jan (UMCH-V) RID, ORCID
Pospíšil, Jan (UMCH-V)Source Title Encyclopedia of Polymer Composites: Properties, Performance and Applications. - New York : Nova Science Publishers, 2011 / Lechkov M. ; Prandzheva S. - ISBN 978-1-60741-717-0 Pages s. 1027-1042 Number of pages 16 s. Number of pages 1245 Language eng - English Country US - United States Keywords polymer photodegradation ; polymer photostabilization ; hindered amine stabilizers 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 000286532800036 Annotation Application of Hindered Amine Stabilizers (HAS) is the state-of-the-art approach to protection of carbon-chain polymers such as polyolefins and polystyrene against weathering. During outdoor exposure, the polymers loose their material properties due to solar radiation-triggered photooxidation. Monitoring of the formation of the HAS-developed key transformation products, HAS-related nitroxides, responsible within the regenerative mechanism for the effective stabilization was used to confirm the heterogeneous character of photooxidation of two carbon-chain polymers, PP and Topas®. Depth profiles of nitroxides inside the polymer plaques during accelerated weathering were monitored using ESRI technique. The shape of the profiles was interpreted in terms of the limited both oxygen diffusion and radiation penetration into polymer plaques. The data indicate differences in the character of the heterogeneous process in dependence on the polymer matrix and on the HAS based stabilizer system. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2012
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