Analysis of aromatic antioxidants and ultraviolet stabilizers in polyethylene using high-temperature extraction with low boiling solvent
✍ Scribed by T. Macko; B. Furtner; K. Lederer
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 471 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
A simple procedure for analysis of aromatic antioxidants and UV stabilizers is described dissolution of polyethylene in n-heptane at temperature 160°C and pressure 0.5 MPa, precipitation of the polymer after a cooling of the solution, filtration of the obtained solution into an injection syringe, and injection into a silica gel column flushed with mobile phase n-heptane plus polar modifier. The eluted additive is detected with a uv detector. Application of the procedure on quantitative determination of Irganox 1330 in PE-MD demonstrates that the above procedure has high recovery of the antioxidant, good reproducibility of the analysis (a = 1.9%), and a very low detection limit of 0.013 mg/l g polymer. The described procedure may be easily adjusted for the analysis of many other additives in semicrystalline polyolefins.