Photooxidation and biodegradation of commercial photodegradable polyethylenes

Arnaud, René; Dabin, Philippe; Lemaire, J.; Al‐Malaika, S.; Chohan, S.; Coker, M.; Scott, Gerald; Fauve, A.; Maaroufi, A.

doi:10.1016/0141-3910(94)90053-1

Cited by 119 publications

(61 citation statements)

References 4 publications

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“…Polyethylene (PE) is one of the most common, widespread and most inexpensive commodity thermoplastic polymers used for industrial as well as medical applications. Despite the numerous papers published in the literature that deals with the thermally or photochemically induced oxidation of polyethylene 1,2,3,4,5,6,7,8,9,10,11,12,13,14 The aim of this paper is to study the thermal and UV degradation of ethylene/α-olefin copolymers and to compare the mechanisms of thermooxidation at moderate temperature (100 °C) to that of photo oxidation at wavelengths above 300 nm. Different catalysts result in differences in the type and concentration of unsaturations, mainly in vinyl, trans-vinylene and vinylidene groups.…”

Section: Introductionmentioning

confidence: 99%

Photo- and thermal-oxidation of polyethylene: Comparison of mechanisms and influence of unsaturation content

Gardette

Perthué

Gardette

et al. 2013

Polymer Degradation and Stability

422

215

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The behaviour of polyethylene with different contents in vinyl and t-vinylene groups have been studied by photooxidation with λ>300 nm light or by thermooxidation at a temperature of 100 °C. The oxidation was studied by infrared spectroscopy and it was shown that the same oxidation products were obtained, but with different relative concentrations depending on the conditions of ageing, i.e. photochemical or thermal conditions. The mechanisms by which the oxidation products are formed were recalled. The differences between photo-and thermooxidation were evidenced on the basis of the stability of ketones that do not accumulate in photochemical conditions, as a result of Norrish reactions. The influence of the initial amount of unsaturated groups on the rates of oxidation was characterized. It was shown that the concentration of unsaturations had no effect on the rate of photooxidation but dramatically influenced the stability in thermooxidative conditions.

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Section: Introductionmentioning

confidence: 99%

Photo- and thermal-oxidation of polyethylene: Comparison of mechanisms and influence of unsaturation content

Gardette

Perthué

Gardette

et al. 2013

Polymer Degradation and Stability

422

215

View full text Add to dashboard Cite

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“…Initial abiotic oxidation is an important stage as it determines the rate of the entire process. In this stage the incorporation of oxygen into the carbon chain polymer backbone results in the formation of functional groups such as carboxylic or hydro-carboxylic acids, esters as well as aldehydes and alcohols [3][4][5][6][7] . Every year, about 140 million tons of synthetic polymers are produced and 30% of this amount is used as packing 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Study of oxo-biodegradable polyethylene degradation in simulated soil

et al. 2014

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This study aims to evaluate the influence of pro-oxidant additive and accelerated aging on the degradation of polyethylene (PE) samples in simulated soil, in accordance with ASTM G160-03. Films of polyethylene with and without pro-oxidant additive were studied, before and after 72 hours of accelerated aging. The films were initially characterized by analyses of Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) (to evaluate the Carbonyl Index (CI)). The films were exposed for 30, 60 and 90 days in simulated soil, with controlled moisture and soil pH. The results showed the degradation of polyethylene films through an increase of CI in samples with additive and accelerated aging after 30 days of exposure, and a decrease, after 60 and 90 days, indicating the uptake of material oxidation by-products by microorganisms. The polyethylene films without pro-oxidant additive after accelerated aging showed greater structural and surface modifications, as compared to films with the additive.

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“…UV light serves as a catalyst that speeds up the process of photocatalytic oxidation [108]. Literature has reported that polymers that degrade by peroxidation followed by bioassimilation of the oxidation products (oxo-biodegradable polymers) are in general more environmental acceptable ("green") than some biologically produced hydro-biodegradable polymers [109].…”

Section: Oxo-biodegradationsmentioning

confidence: 99%