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Correlation of a Temperate UV-Weathering Cycle to Outdoor Exposure for the Determination of the Environmental Instability of Polyethylene Films Using HT-GPC Analysis

Polymateria Limited, i-Hub, Imperial College White City Campus, 84 Wood Lane, London W12 OBZ, UK
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Academic Editor: Victor Tcherdyntsev
Polymers 2021, 13(4), 591; https://doi.org/10.3390/polym13040591
Received: 26 January 2021 / Revised: 10 February 2021 / Accepted: 12 February 2021 / Published: 16 February 2021
(This article belongs to the Section Polymer Analysis and Characterization)
Accelerated UV-weathering cycles are predominately used for evaluating the durability of plastic materials, particularly polyethylene (PE) films. The point of failure for this testing is usually the loss of a physical property, such as the loss of tensile strength over time. For plastics designed to be instable under environmental conditions, the accelerated weathering cycles are yet to be defined and their correlation to outdoor exposure has yet to be made. This study demonstrates the utility of a newly defined temperate accelerated UV-weathering cycle, recently codified in the British Standard PAS 9017:2020. In addition, the effectiveness of the laboratory weathering cycle has been correlated to real-world outdoor exposure through simultaneous testing of the same samples at a specialist outdoor exposure site in Florida. The utility of the testing methodology and the performance of the polyethylene samples was demonstrated through the use of High Temperature Gel Permeation Chromatography (HT-GPC) analysis. The data led to a detailed insight into the physico-chemical changes occurring in the PE films upon exposure to environmental stimuli. By comparison, and surprisingly, the techniques employed appear to provide an insight into the processes in which secondary micro-particles of PE are formed from macro-polyethylene samples. The temperate accelerated UV-weathering cycle over 14 days demonstrated an approximate correlation to 90 days of outdoor exposure in Florida for the PE film studied. View Full-Text
Keywords: accelerated UV-weathering; polyethylene; outdoor exposure; weathering correlation; HT-GPC; carbonyl index; molecular weight accelerated UV-weathering; polyethylene; outdoor exposure; weathering correlation; HT-GPC; carbonyl index; molecular weight
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MDPI and ACS Style

Hill, G.; Moreira, C.; Huynh, F.; Trufasila, A.; Ly, F.; Lloyd, R.; Sawal, H.; Wallis, C.J. Correlation of a Temperate UV-Weathering Cycle to Outdoor Exposure for the Determination of the Environmental Instability of Polyethylene Films Using HT-GPC Analysis. Polymers 2021, 13, 591. https://doi.org/10.3390/polym13040591

AMA Style

Hill G, Moreira C, Huynh F, Trufasila A, Ly F, Lloyd R, Sawal H, Wallis CJ. Correlation of a Temperate UV-Weathering Cycle to Outdoor Exposure for the Determination of the Environmental Instability of Polyethylene Films Using HT-GPC Analysis. Polymers. 2021; 13(4):591. https://doi.org/10.3390/polym13040591

Chicago/Turabian Style

Hill, Gavin, Celine Moreira, Florence Huynh, Ana Trufasila, Faith Ly, Richard Lloyd, Hasan Sawal, and Christopher J. Wallis. 2021. "Correlation of a Temperate UV-Weathering Cycle to Outdoor Exposure for the Determination of the Environmental Instability of Polyethylene Films Using HT-GPC Analysis" Polymers 13, no. 4: 591. https://doi.org/10.3390/polym13040591

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