Degradation product pattern and morphology changes as means to differentiate abiotically and biotically aged degradable polyethylene

Albertsson, Ann‐Christine; Barenstedt, Camilla; Karlsson, Sigbritt; Lindberg, T.

doi:10.1016/0032-3861(95)97868-g

Cited by 201 publications

(131 citation statements)

References 13 publications

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“…28 The low molecular weight oxidation products of PE were assimilated by microorganisms. 29,30 Biotic and Abiotic Degradation Products of PLA Different techniques including GC-MS, 6,31 HPLC, 32,33 capillary zone electrophoresis (CZE), 34 and enzymatic assays [11][12][13]35,36 were used to detect hydrolysis products of PLA and its copolymers. All of these techniques have advantages and limitations.…”

Section: Changes On Surface Of Filmsmentioning

confidence: 99%

Influence of low molecular weight lactic acid derivatives on degradability of polylactide

Hakkarainen

Karlsson

Albertsson

2000

J. Appl. Polym. Sci.

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ABSTRACT:The presence of low molecular weight lactic acid derivatives in films enhanced the degradability of polylactide in a biotic medium. Two different biotic and abiotic series were investigated. The films used for the first abiotic and biotic series (a-1 and b-1 films) initially contained some lactic acid and lactoyl lactic acid, while the films used for the second abiotic and biotic series (a-2 and b-2 films) did not originally contain them. The b-1 films decreased in molecular weight during 3 weeks in the biotic medium, while no molecular weight decrease was seen in the a-1 films aged in a corresponding abiotic mineral medium. The molecular weight for the a-2 and b-2 films without lactic and lactoyl lactic acid remained almost constant. Scanning electron microscopy micrographs showed a larger amount of bacteria and fungi growing on the surface of b-1 films compared to b-2 films; thus, the presence of easily assimilated lactic acid and lactoyl lactic acid in the films improved the initial growth of microorganisms on the film surfaces. Gas chromatography and mass spectrometry analysis showed that lactic acid and lactoyl lactic acid were rapidly assimilated from the films aged in a biotic medium. New degradation products (e.g., ethyl ester of lactoyl lactic acid, acetic acid, and propanoic acid) were formed during aging in a biotic medium. Acetic acid and propanoic acid were formed as intermediate degradation products during the initial stages, but they were no longer detected after prolonged aging. The concentration of the ethyl ester of lactoyl lactic acid increased with aging time.

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Section: Changes On Surface Of Filmsmentioning

confidence: 99%

Influence of low molecular weight lactic acid derivatives on degradability of polylactide

Hakkarainen

Karlsson

Albertsson

2000

J. Appl. Polym. Sci.

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“…Photodegradation can aid rapid disintegration of polymers into a powdery residue with a much-reduced visual impact [2][3][4]. Further abiotic degradation of such polyethylene can reduce molecular mass to levels where the material becomes susceptible to biodegradation [3,[5][6][7][8]. Prodegradant additives are used to enhance such oxo-biodegradation of polyolefins [4,[7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Mn2Al-LDH- and Co2Al-LDH-stearate as photodegradants for LDPE film

Magagula

Nhlapo

Focke

2009

Polymer Degradation and Stability

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The layered double hydroxides (LDH) Mn 2 Al-LDH-stearate and Co 2 Al-LDH-stearate were prepared by a surfactant-assisted intercalation of the corresponding precursor LDH-CO 3 forms.These compounds were evaluated as potential photodegradant additives in low density polyethylene films with a thickness of ca. 40 mm. They were incorporated into blown polyethylene films via a 10% masterbatch. The films were subjected to accelerated ageing in a QUV weatherometer. The machine was fitted with A320 lamps and operated on a dry cycle at 63 C and an irradiance of 0.67 W/m 2 . It was found that 100 h of QUV exposure was sufficient to cause mechanical embrittlement of films containing as little as 0.1% of either active.

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“…It was found that the composting of gamma and UV sterilized samples reduce the carbonyl index. This it may be due to the release of short chain carboxylic acids in the form of degradation products during the biotic step [27,28,30,31]. This decrease was not much significant, since there may be incomplete consumption of carbonyl compounds and may be possibility of continuing oxidation processes (thermal oxidation and aerobic condition).…”

Section: Ftir Spectral Changesmentioning

confidence: 98%

Effect of Different Sterilization Methods on Biodegradation of Biomedical Polypropylene

Alariqi¹,

Mutair²

2016

J Environ Anal Toxicol

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Degradation product pattern and morphology changes as means to differentiate abiotically and biotically aged degradable polyethylene

Cited by 201 publications

References 13 publications

Influence of low molecular weight lactic acid derivatives on degradability of polylactide

Influence of low molecular weight lactic acid derivatives on degradability of polylactide

Mn2Al-LDH- and Co2Al-LDH-stearate as photodegradants for LDPE film

Effect of Different Sterilization Methods on Biodegradation of Biomedical Polypropylene

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