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Polymer Degradation and Stability
Vol.
94, No.4, 2009; Pages: 659 - 663

Oxo-biodegradable polyolefins show continued and increased thermal oxidative degradation after exposure to light

Nils B. Vogt, Emil Arne Kleppe

Siamalgamate Co., Ltd., 66 Soi Romklao 58, Romklao Road, Klongsampravet, Lad Krabang, Bangkok 10520, Thailand.

Abstract

Samples of polyethylene (PE) and polypropylene (PP) with 2% Renatura™ pro-oxidant additive were subjected to varying times of weathering (UVCON; ISO 4892-3), transferred to dark thermal exposure (at 70°C) and the subsequent degradation monitored by measuring elongation at break and tensile strength during intervals up to 45 days. The results demonstrate that the oxidative degradation, after initial light exposure, continues more rapidly in the dark thermal conditions and that increased exposure to light increases thermal oxidative degradation.

Keywords: Oxo-biodegradation; Photo-oxo-degradation; Thermal degradation; Iron-based oxo-biodegradable additive; Landfill; Composting.


 

 

 
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