Effect of soil environment on the photo-degradation of polyethylene films

Gauthier, Emilie, Nikolic, Melissa, Truss, Rowan, Laycock, Bronwyn and Halley, Peter (2015) Effect of soil environment on the photo-degradation of polyethylene films. Journal of Applied Polymer Science, 132 39: 42558.1-42558.10. doi:10.1002/app.42558

Author Gauthier, Emilie
Nikolic, Melissa
Truss, Rowan
Laycock, Bronwyn
Halley, Peter
Title Effect of soil environment on the photo-degradation of polyethylene films
Journal name Journal of Applied Polymer Science   Check publisher's open access policy
ISSN 1097-4628
Publication date 2015-10
Sub-type Article (original research)
DOI 10.1002/app.42558
Open Access Status Not yet assessed
Volume 132
Issue 39
Start page 42558.1
End page 42558.10
Total pages 10
Place of publication Hoboken, NJ, United States
Publisher John Wiley and Sons Inc.
Collection year 2016
Language eng
Abstract Outdoor weathering field trials performed with oxo-degradable polyethylene (PE) thin films were conducted across temperate, grassland, and subtropical sites around Australia. It was found that a site factor, that was apparently independent of total solar dose and temperature, significantly impacted the rate and extent of photo-oxidation. Controlled laboratory-based accelerated aging trials of both PE film with no prodegradant and oxo-degradable PE films (containing iron stearate) revealed that the rate and extent of PE photo-oxidation did not correlate with temperature under the film or UV exposure, but was soil dependent. Under accelerated photo-oxidative conditions, the time to reach embrittlement for a PE film aged over the soil from the temperate site (OM 8.4) was half (24.5 days) the time taken when aged over air (48 days). Further investigation revealed that humic acids and fulvic acids within soil organic matter may contribute to an increased rate of PE photo-oxidation, possibly through the formation of volatile reactive oxygen species that may form under photo-oxidative conditions. The presence of water also had a significant impact on the rate of photo-oxidation. Overall, the impact of soil on PE photo-oxidation was found to be complex and likely dependent at least in part on soil components that varied between different soil types, consequently influencing their photo-chemistry.
Keyword Ageing
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2016 Collection
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