Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation/photostabilization of carbon chain polymers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F11%3A00364888" target="_blank" >RIV/61389013:_____/11:00364888 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation/photostabilization of carbon chain polymers

Popis výsledku v původním jazyce

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 ofthe 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.

Název v anglickém jazyce

Hindered amine stabilizers as sources of markers of the heterogeneous photooxidation/photostabilization of carbon chain polymers

Popis výsledku anglicky

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 ofthe 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.

Druh

C - Kapitola v odborné knize

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

<a href="/cs/project/IAA400500804" target="_blank" >IAA400500804: Studium prostorové heterogenity foto- a termo-degradace tuhých polymerů moderními fyzikálními metodami</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Encyclopedia of Polymer Composites: Properties, Performance and Applications

ISBN

978-1-60741-717-0

Počet stran výsledku

16

Strana od-do

1027-1042

Počet stran knihy

1245

Název nakladatele

Nova Science Publishers

Místo vydání

New York

Kód UT WoS kapitoly

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