Abstract
In the present study, the applicability of high-performance liquid chromatography hyphenated with
highly sophisticated mass spectrometric detection (HPLC-MS) for analysis of hindered amine light stabilizers
(HALS), thiosynergists and their conversion products is demonstrated. Degradation pathways as
well as interactions between these stabilizer groups were successfully studied by analytical evaluation of
model formulations after accelerated aging in the polymer-mimicking solvent squalane. Binary mixtures
including HALS and thiosynergist as well as three component systems additionally including a phenolic
antioxidant were investigated. Results showed that transformation pathways of HALS are highly influenced
by the presence of sulfur-containing compounds and no aminoxyl radicals (typical reactive intermediates
of HALS) were observed in these mixtures. To get an understanding of the effect of this
altered stabilization mechanism on the protection of the polymer, rating of stabilization efficacies was
performed by comparing the amount of degradation products derived from squalane using different
formulations.
| Original language | English |
|---|---|
| Pages (from-to) | 509-517 |
| Number of pages | 9 |
| Journal | Polymer Degradation and Stability |
| Volume | 110 |
| DOIs | |
| Publication status | Published - 2014 |
Fields of science
- 205 Materials Engineering
- 205011 Polymer engineering
- 205016 Materials testing
- 207106 Renewable energy
- 211908 Energy research
- 103023 Polymer physics
- 104018 Polymer chemistry
- 211909 Energy technology
- 104019 Polymer sciences
JKU Focus areas
- Nano-, Bio- and Polymer-Systems: From Structure to Function
