Blown films of nanocomposites prepared from low density polyethylene and a sodium ionomer of poly(ethylene-co-methacrylic acid)

Shah, Rhutesh K.; Krishnaswamy, Rajendra K.; Takahashi, Shinji; Paul, Donald R

doi:10.1016/j.polymer.2006.06.051

Cited by 57 publications

(42 citation statements)

References 29 publications

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“…Such defects can present themselves as microvoids, which create free volume for easier oxygen diffusion. Similar behavior was also shown in LDPE nanocomposite films prepared by Shah et al [50] where the highest oxygen barrier properties were found at an intermediate draw down ratio. It is also possible that under conditions of high orientation, crystallinity in semi-crystalline polymers is reduced, which could have a negative impact on barrier properties.…”

Section: Process Conditionssupporting

confidence: 84%

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Polymer/Layered Silicates Nanocomposites for Barrier Technology

Labuschagne

Moolman

Maity

2012

Intelligent Nanomaterials

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Plastics are used increasingly in packaging applications due to a number of favorable properties, such as versatility, low weight, and low cost. However, their biggest drawback when compared to traditional packaging materials, such as glass and metals, is their relatively high permeability to gases and vapors. Specifically in food and beverage packaging, low permeability to oxygen is critical. This area of research has challenged polymer scientists, materials scientists, physicists, and chemists all over the world to fabricate new nanocomposite materials for specialized applications. They have shown that the incorporation of layered silicates can significantly reduce the permeability of gases through plastics. This chapter is aimed at highlighting the interesting potential aspects of research on selective hybrid nanocomposite materials. The effect of aspect ratio and the degree of clay exfoliation and polymer-clay interaction on the gas permeability will be discussed along with the effect of the types of organic modifier, polymer chemical structure, nature of compatibilizer, blending sequence, processing conditions as well as clay loading on these properties.

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Section: Process Conditionssupporting

confidence: 84%

“…The greater polarity of such ionomers has shown to improve organoclay exfoliation considerably [86,87]. The effect on oxygen barrier properties has also been investigated [50]. Neat ionomer exhibited lower oxygen permeability than neat LDPE, which was attributed to strong intramolecular interactions.…”

Section: Compatibilizer and Polymermentioning

confidence: 99%

Polymer/Layered Silicates Nanocomposites for Barrier Technology

Labuschagne

Moolman

Maity

2012

Intelligent Nanomaterials

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“…These nanocomposites show improved mechanical and barrier properties compared to the corresponding neat polymer matrix and conventional composites due to the nano-scale reinforcement and the tortuous diffusion path caused by the high aspect ratio of aluminosilicate layers [1][2][3][4][5] . In order to maximize these benefits it is necessary to achieve a high level of organoclay exfoliation, uniform distribution and appropriate orientation of clay platelets [6][7][8][9] . Among various processes, the following two are considered as being commercially attractive for preparing layered silicate based polymer nanocomposites: in situ polymerization and melt compounding 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Effect of an Organo-Modified Montmorillonite on the Barrier Properties of PET Nanocomposites Using a Polyester Ionomer as a Compatibilizing Agent

Vidotti

Chinellato

et al. 2017

Mat. Res.

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Poly(ethylene terephthalate)/organically modified montmorillonite (PET/o-Mt) nanocomposites were prepared via melt intercalation in a twin-screw extruder using a polyester ionomer (PETi) as compatibilizer. The o-Mt content used was 0, 1, 3 or 5 wt% and the compatibilizer/o-Mt mass ratio was 0/1, 1/1 or 3/1. The main objective was to study the effects of the addition of o-Mt and compatibilizer on the barrier properties of PET/o-Mt nanocomposites. The nanocomposites showed a significant reduction in CO 2 permeability of up to 50% when compared to the neat PET, without significant change in the CO 2 solubility revealing the importance of the diffusional path imputed by the organoclay on the overall permeation process. Water vapor permeability was reduced for all nanocomposites, achieving up to 30% reduction for the nanocomposite containing a compatibilizer/o-Mt mass ratio of 1/1. Overall, the nanocomposite containing 5 wt% of organoclay and compatibilizer/o-Mt mass ratio of 1/1 showed the best barrier properties.

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“…A lot of attention has been particularly paid these last years on nanofillers such as clays to reinforce PA or PE properties [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Indeed due to their high aspect ratio and their impermeable character, the clay platelets are expected to induce significant tortuosity effects when they are dispersed within a polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of the Gas Barrier Properties of Polyethylene and Polyamide Through the Nanocomposite Approach: Key Factors and Limitations

Picard

Gérard

Espuche

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Re´sume´-Renforcement des proprie´te´s barrie`re aux gaz de matrices polye´thyle`ne et polyamide par l'approche nanocomposite : facteurs cle´s et limitations -Dans cette e´tude, des nanocomposites sont pre´pare´s par voie fondue pour deux matrices, une matrice polyamide 6 (PA6) et une matrice polye´thyle`ne (PE), leur morphologie ainsi que leurs proprie´te´s barrie`res sont e´tudie´es. Les argiles organophiles sont choisies en fonction de la nature chimique de chacune des matrices polyme`res. Les nanocomposites pre´pare´s a`partir de polyamide 6 pre´sentent une structure exfolie´e et des proprie´te´s barrie`res ame´liore´es alors qu'une morphologie de type microcomposite ne conduisant aà ucune ame´lioration des proprie´te´s barrie`res est obtenue pour le syste`me PE/montmorillonite. Diffe´rents polye´thyle`nes modifie´s sont alors e´value´s en tant qu'agents compatibilisants pour les syste`mes PE. Les effets de la masse molaire, de la polarite´et de la fraction massique d'agent compatibilisant sur la dispersion des charges et sur les proprie´te´s barrie`res sont e´tudie´s. Un taux massique d'agent compatibilisant e´gal a`4 fois celui des charges s'ave`re eˆtre optimal pour l'ensemble des agents compatibilisants. Par ailleurs, la masse molaire des agents compatibilisants joue un roˆle primordial sur l'e´tat de dispersion des charges. Contrairement aux syste`mes PA, les proprie´te´s barrie`res des syste`mes PE ne sont pas directement relie´es a`l'e´tat de dispersion des charges mais de´pendent e´galement des interfaces charges/matrice. Les PE oxyde´s de faible masse molaire sont identifie´s comme des agents compatibilisants particulie`rement inte´ressants pour les proprie´te´s barrie`res et une optimisation pas a`pas des syste`mes est entreprise. Une combinaison de PE oxyde´de faible masse molaire et de PE greffe´anhydride male´ique de haute masse molaire conduisant a`diviser la perme´abilite´aux gaz du nanocomposite d'un facteur 2 par rapport a`la matrice PE s'ave`re particulie`rement inte´ressante.Abstract -Reinforcement of the Gas Barrier Properties of Polyethylene and Polyamide Through the Nanocomposite Approach: Key Factors and Limitations -In this study, polyamide 6 (PA6) and polyethylene (PE) nanocomposites were prepared from melt blending and a detailed characterization of the nanocomposite morphology and gas barrier properties was performed. The choice of the organoclay was adapted to each polymer matrix. Exfoliated morphology and improved gas transport Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 2, pp. 237-249 Ó E. Picard et al., published by IFP Energies nouvelles, 2013 DOI: 10.2516 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.properties were obtained by melt mixing the polar PA6 matrix and the organoclay, whereas a microcomposite with poor...

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Blown films of nanocomposites prepared from low density polyethylene and a sodium ionomer of poly(ethylene-co-methacrylic acid)

Cited by 57 publications

References 29 publications

Polymer/Layered Silicates Nanocomposites for Barrier Technology

Polymer/Layered Silicates Nanocomposites for Barrier Technology

Effect of an Organo-Modified Montmorillonite on the Barrier Properties of PET Nanocomposites Using a Polyester Ionomer as a Compatibilizing Agent

Reinforcement of the Gas Barrier Properties of Polyethylene and Polyamide Through the Nanocomposite Approach: Key Factors and Limitations

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