Presentation Profile
New Methodology for Determining Hindered Amine Light Stabilizers in Polyethylene
Currently Scheduled: 10/11/2023 - 9:30 AM - 9:50 AM
Main Author
Deborah Phelps - Dow Chemical
- Peter Shimeall - Dow Chemical
Abstract:
Hindered amine light stabilizers (HALS) are used to protect polyethylene from weathering during exposure in outdoor applications such as pipe, geomembrane liners, wire and cable, and consumer articles (furniture, playground equipment). HALS are particularly challenging to analyze because of their chemical and physical properties. Most have oligomeric structures, high molecular weight, and lack a strong chromophore for UV/Vis absorbance detection. There are very few external publications applicable to analysis of HALS in PE. A reversed phase liquid chromatography method (RPLC) was developed successfully for rapid and accurate quantitation of HALS additives in PE. The HALS are extracted using total dissolution methodology (TDM) followed by analysis using RPLC with UV/Vis absorbance detection and evaporative light scattering detection (ELSD). This poster will provide details on the methodology and application to HALS in polyethylene resins.
