The effect of nanoparticles on the loss of UV stabilizers in polyethylene films

Weizman, Orli; Mead, Joey; Dodiuk, H.; Ophir, Amos; Kenig, S.

doi:10.1016/j.polymdegradstab.2021.109811

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…Furthermore, a different shape of the curve is also noticed in the materials with silica particles. The strong adsorption of the Irganox 1076 antioxidant on the external and internal surfaces of silica could hinder its migration, so that the degradation occurs less abruptly and is delayed in time [13].…”

Section: Characterization and Properties Of The Different Materialsmentioning

confidence: 99%

“…Furthermore, different inorganic compounds, based on aluminosilicate clay minerals or silica particles, have been used as carriers of antioxidants to maximize their efficiency, leading to the improvement of the thermo-oxidative behavior of elastomers and thermoplastics [12][13][14][15]. Thus, materials based on mesoporous silica, such as SBA-15 (Santa Barbara Amorphous) or MCM-41 (Mobil Crystalline Materials No.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Thermal Protection in Recycled Polyolefins through Hybrid Mesoporous Silica–Antioxidant Particles

Blázquez-Blázquez,

Barranco-García,

Díez-Rodríguez

et al. 2024

Recycling

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The deficient management of plastic waste has caused a serious worldwide environmental problem. Thus, one of the main challenges for the industry in the plastics sector in contributing to sustainability and a circular economy consists of providing a subsequent service life to this waste. For that purpose, the appropriate incorporation of antioxidants will play a key role in preventing or postponing the degradation of plastic waste, where the formation of radicals is initiated during its previous lifetime by the action of degrading agents. Functionalized particles, based on mesoporous MCM-41 silica with Irganox 1076, were prepared with two different protocols and were further incorporated into a material containing virgin PP and 30 wt.% of recycled PP, with the purpose of guaranteeing thermal stability during its next service life. A very significant increase in the thermal stability of the resulting composites was found, attributable to the synergistic action between the Irganox 1076 antioxidant and the MCM-41 particles. In addition, the presence of hybrid particles leads to an important nucleating effect for the crystallization of PP. Moreover, a reinforcing role was also played by these modified mesoporous silicas in the resultant systems. The presented methodology constitutes, therefore, a promising strategy for contributing to the circular economy—since the synergy between the Irganox 1076 antioxidant and MCM-41 particles was found to play an important role in the ultimate performance of recycled polyolefins.

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Section: Characterization and Properties Of The Different Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of Thermal Protection in Recycled Polyolefins through Hybrid Mesoporous Silica–Antioxidant Particles

Blázquez-Blázquez,

Barranco-García,

Díez-Rodríguez

et al. 2024

Recycling

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“…A variety of clays, including montmorillonite (MMT), bentonite, zeolite, and halloysite types ones, were used with polyethylene . Most commonly, MMT has vastly been studied due to its platy structure, which reinforces the matrix, while enhancing their resistances to thermal, flame, gas permeation, and mechanical stresses. , Polyethylene (matrix), being hydrophobic, exhibits a poor interfacial adhesion with pristine clay, since clay is being hydrophilic. However, the organically modified clay type, e.g., cloisite 30B, with a polar organic modifier (methyl, tallow, bis-2-hydroxyethyl, and quaternary ammonium ion) can interact with the hydrophobic matrix to increase the adhesion of clay to the non-polar polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Robust Tear-Resistant Blown Nanocomposite Films for Barrier Packaging: Role of Clay Platelet Thickness in Tear Mechanics and Barrier Performances

Thakur

Satapathy

2023

ACS Appl. Polym. Mater.

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A linear low-density polyethylene (LLDPE) nanocomposite film with organically modified clay (Cloisite 30B) as a filler and LLDPE-grafted-maleic anhydride as a modifier was prepared by extrusion film blowing. The thermal properties, as investigated by thermogravimetric analysis and differential scanning calorimetry, indicated increased crystallinity with enhanced thermal stability. Morphological attributes of nanocomposite films were demonstrated by transmission electron microscopy, and the thickness distribution of clay platelets was analyzed by kite plot. The radius of gyration (R g) of LLDPE chains is studied by small-angle X-ray scattering from the Guinier region. The analysis of tear fracture and its associated surface morphology was done by scanning electron microscopy. The oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) were measured for nanocomposite films. The 5 wt % clay-loaded nanocomposite film showed a ∼23.5 and ∼33.4% decrease in WVTR and OTR, respectively, compared to that of neat LLDPE films. The effect of crystallinity on tear energy and the influence of clay thickness in film transmittance on the barrier properties of various nanocomposite films with varied clay content were discussed. The paper demonstrated the correspondence between lower R g values and low platelet thickness, which in turn remained directly correlated to OTR and WVTR.

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