Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5204032 | Polymer Degradation and Stability | 2010 | 5 Pages |
Abstract
The photochemical behaviour of several polyethylene/polyamide-6 blends was studied under conditions of artificial accelerated weathering. Particular attention was paid to five different compositions ranging from pure polyethylene to pure polyamide with blends of PE/PA-6 of various compositions: 75/25, 50/50 and 25/75Â wt/wt%. Analysis by infrared spectroscopy of the chemical modifications caused by photooxidation showed that exposing the polyethylene/polyamide-6 blends to UV-light irradiation led to the formation of oxidation photoproducts in both polymer phases. In agreement with both the mechanical and spectroscopic analyses, the photooxidation rate of the blends was observed to be much higher than that of the homopolymers. The results given in this paper suggest that photooxidation of the PE/PA blends starts in the polyamide phase and that the subsequent photooxidation of the polyethylene phase may be initiated by the radicals coming from the oxidation of PA.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Sandrine Therias, Nadka Tzankova Dintcheva, Jean-Luc Gardette, Francesco Paolo La Mantia,