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Encyclopedia of Polymer Composites: Properties, Performance and Applications
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SYSNO ASEP 0364888 Druh ASEP M - Kapitola v monografii Zařazení RIV C - Kapitola v knize Název Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation/photostabilization of carbon chain polymers Tvůrce(i) Pilař, Jan (UMCH-V) RID, ORCID
Pospíšil, Jan (UMCH-V)Zdroj.dok. Encyclopedia of Polymer Composites: Properties, Performance and Applications. - New York : Nova Science Publishers, 2011 / Lechkov M. ; Prandzheva S. - ISBN 978-1-60741-717-0 Rozsah stran s. 1027-1042 Poč.str. 16 s. Poč.str.knihy 1245 Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova polymer photodegradation ; polymer photostabilization ; hindered amine stabilizers Vědní obor RIV CD - Makromolekulární chemie CEP IAA400500804 GA AV ČR - Akademie věd CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000286532800036 Anotace 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. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2012
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