Susanne Beißmann, Michael Reisinger, Klemens Grabmayer, Gernot Wallner, David Nitsche, Wolfgang Buchberger,
"Analytical evaluation of the performance of stabilization systems for polyolefinic materials. Part I: Interactions between hindered amine light stabilizers and phenolic antioxidants"
, in Polymer Degradation and Stability, Vol. 110, ELSEVIER, Seite(n) 498-508, 2014, ISSN: 1873-2321
Original Titel:
Analytical evaluation of the performance of stabilization systems for polyolefinic materials. Part I: Interactions between hindered amine light stabilizers and phenolic antioxidants
Sprache des Titels:
Englisch
Original Kurzfassung:
Degradation pathways and interactions between the phenolic antioxidant Irganox 1330 and three
commercially used hindered amine light stabilizers (HALS) were successfully studied by accelerated
aging of model formulations in the polymer-mimicking solvent squalane. Methods based on highperformance
liquid chromatography hyphenated with mass spectrometric detection (HPLC-MS) were
developed for structural elucidation of transformation products and monitoring of interactions between
the two chemical groups. The developed method was able to differentiate and chromatographically
separate transformation products originating from the HALS including the active aminoxyl radicals. The
investigations showed a strong antagonism between HALS and phenols, leading to useless consumption
of both stabilizer groups, whereby tertiary amines showed less effect compared to secondary HALS. By
monitoring the degradation behavior of unstabilized squalane it was possible to perform a rating of
stabilization efficiencies of the different systems.