Natural weather, soil burial and sea water ageing of low‐density polyethylene: Effect of starch/linear low‐density polyethylene masterbatch

Elanmugilan, M.; Sreekumar, P.A.; Singha, Nikhil K.; Al‐Harthi, Mamdouh A.; De, S. K.

doi:10.1002/app.38769

Cited by 12 publications

(5 citation statements)

References 35 publications

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“…The microbial assimilation of natural polymers in blends was observed to increase the surface area of synthetic bulk materials and to render them more susceptible to degradation. The underlying mechanism is a complex interaction of abiotic‐ and biotic‐mediated oxidative processes . The blending of PE with different natural polymers are described in the following sections.…”

Section: Accelerating the Degradation Of Polyolefinsmentioning

confidence: 99%

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Accelerating the degradation of polyolefins through additives and blending

Liu

Gao

Sangwan

et al. 2014

J of Applied Polymer Sci

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Polyolefins are popular because of their low price, useful properties, broad supply chains, and mature processing facilities, but they do not easily degrade in the natural environment, and hence, the development of degradable polyolefins has attracted increasing interest. Oxidative degradation and blending with natural polymers can accelerate the degradation of polyolefins in natural environments. In this article, we review the research and developments in the acceleration of the degradation of polyolefin blends and composites, including both the fundamental science, such as the degradation mechanisms and characterizations, and application techniques, such as the processing conditions and formulations.

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Section: Accelerating the Degradation Of Polyolefinsmentioning

confidence: 99%

“…The underlying mechanism is a complex interaction of abioticand biotic-mediated oxidative processes. 2,12,46,[84][85][86][87] The blending of PE with different natural polymers are described in the following sections.…”

mentioning

confidence: 99%

Accelerating the degradation of polyolefins through additives and blending

Liu

Gao

Sangwan

et al. 2014

J of Applied Polymer Sci

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“…Biodegradation of PE is generally extremely slow. However, the degradability (including the biodegradability) of PE can be improved by blending PE with starch [27,29,30]. This improvement results from an increase in the surface area of the PE matrix because the porosity of PE is increased by rst biodegrading and dissipating the easily biodegradable starch component [29,30].…”

Section: Resultsmentioning

confidence: 99%

“…However, the degradability (including the biodegradability) of PE can be improved by blending PE with starch [27,29,30]. This improvement results from an increase in the surface area of the PE matrix because the porosity of PE is increased by rst biodegrading and dissipating the easily biodegradable starch component [29,30]. The improved biodegradability of LLDPE/NPQ also results from selective biodegradation of the NPQ domains, which are nanosized and dispersed in the PE matrix.…”

Section: Resultsmentioning

confidence: 99%

Study on the onset mechanism of bio-blister degradation of polyolefin by diatom attachment in seawater

NAKATANI,

NARIZUMI,

OKUBO

et al. 2023

Preprint

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It is essential to develop a mechanism for lowering the molecular weight of polyolefins to achieve biodegradation in seawater. In this study, a prephotodegradation treatment was applied to a blend sample to generate hydroperoxide groups in the polypropylene component of the blend to initiate autoxidation and generate carboxylic acid substances in the poly(lactic acid) component of the blend to promote autoxidation. However, the generated carboxylic acid substances were neutralized in seawater, which is alkaline, disabling the acid-activated autoxidation mechanism for developing biodegradability of the blend. Although aqueous Cl− was an effective inhibitor of autoxidation of polyolefins in seawater, autoxidation could be initiated using the dissociation of ClOH (called blister degradation) to lower the seawater pH. The blister degradation mechanism enabled autoxidation, even in seawater, by taking advantage of the ability of diatoms to secrete transparent exopolymer particles (TEP) to prevent direct contact between the surface layer of polyolefins and alkaline seawater. Bio-blister degradation induced by diatoms was characterized for a linear low-density polyethylene (LLDPE)/starch sample. SEM, IR, and DSC analyses showed that diatoms induced the disintegration of the LLDPE component of the blend sample in seawater.

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“…Development of degradable polyolefin has attracted increasing interest due to their low price, useful properties, broad suppliers, and mature processing facilities and techniques. UV‐oxidative degradation and blending with natural polymers can enhance their biodegradability . Oxo‐degradation incorporates oxygen into the carbon chain and results in the formation of functional groups such as carboxylic or hydro‐carboxylic acids, esters, aldehydes, and alcohols.…”

Section: Introductionmentioning

confidence: 99%

New evidences of accelerating degradation of polyethylene by starch

Liu

Xie²,

Petinakis

et al. 2013

J of Applied Polymer Sci

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An investigation into the effects of starch on both, UV photo-oxidative degradation and biodegradation, of HDPE was focused on the interface between HDPE and starch using Synchrotron-FTIR microscope (SFTIR-M) and scanning electronic microscope (SEM). Carbonyl group detection by FTIR was conducted to evaluate the effect of degradation following exposure to UV photo-oxidative degradation. The results showed that the concentration of carbonyl groups on the interface were higher, suggesting the role of starch in accelerating the UV photo-oxidative degradation of HDPE. The interface between HDPE and starch was further observed under SEM to study the morphological changes after UV photo-oxidative degradation and biodegradation. Micro-cracking was observed on the interface between starch and HDPE after UV photo-oxidative degradation. Tensile testing after UV exposure showed that the variation rate of elongation was higher for the samples containing starch. Starch, an easily biodegradable material, can also act as initial source of nutrients for micro-organisms (bacteria, fungi, and algae) in the blend materials thus enhancing their biodegradability.

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Natural weather, soil burial and sea water ageing of low‐density polyethylene: Effect of starch/linear low‐density polyethylene masterbatch

Cited by 12 publications

References 35 publications

Accelerating the degradation of polyolefins through additives and blending

Accelerating the degradation of polyolefins through additives and blending

Study on the onset mechanism of bio-blister degradation of polyolefin by diatom attachment in seawater

New evidences of accelerating degradation of polyethylene by starch

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