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- W2024477209 abstract "Biodegradation of polyethylene and oxo-biodegradable polyethylene films was studied in this work. Abiotic oxidation, which is the first stage of oxo-biodegradation, was carried out for a period corresponding to 4 years of thermo-oxidation at composting temperatures. The oxidation was followed by biodegradation, which was achieved by inoculating the microorganism Pseudomonas aeruginosa on polyethylene film in mineral medium and monitoring its degradation. The changes in the molecular weight of polyethylene and the concentration of oxidation products were monitored by size exclusion chromatography and Fourier transform infrared (FTIR) spectroscopy, respectively. It has been found that the initial abiotic oxidation helps to reduce the molecular weight of oxo-biodegradable polyethylene and form easily biodegradable product fractions. In the microbial degradation stage, P. aeruginosa is found to form biofilm on polymer film indicating its growth. Molecular weight distribution data for biodegraded oxo-biodegradable polyethylene have shown that P. aeruginosa is able to utilize the low-molecular weight fractions produced during oxidation. However, it is not able to perturb the whole of the polymer volume as indicated by the narrowing of the polymer molecular weight distribution curve toward higher molecular fractions. The decrease in the carbonyl index, which indicates the concentration of carbonyl compounds, with time also indicates the progress of biodegradation. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009" @default.
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- W2024477209 date "2009-02-05" @default.
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- W2024477209 title "Biodegradation of oxo-biodegradable polyethylene" @default.
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- W2024477209 doi "https://doi.org/10.1002/app.29073" @default.
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