Intercalated linear low density polyethylene (LLDPE)/clay nanocomposites prepared with oxidized polyethylene as a new type compatibilizer: Structural, mechanical and barrier properties

Durmuş, Ali; Woo, Maybelle; Kaşgöz, Ahmet; Macosko, Christopher W.; Tsapatsis, Michael

doi:10.1016/j.eurpolymj.2007.06.019

Cited by 183 publications

(174 citation statements)

References 49 publications

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“…Maleic anhydride grafted polyolefins are the most common interfacial agents used in polyolefin based nanocomposites. The interest of oxidized paraffins for gas barrier properties was first demonstrated by our team few years ago [29,30] and then confirmed by other groups [31]. For this study, nanocomposites with the following weight composition 75 wt% PE/20 wt% interfacial agent/5 wt% MMT-Tallow were prepared by melt blending according to the protocol described in the experimental part.…”

Section: Ternary Systems Based On Pe Matrix: Influence Of Different Imentioning

confidence: 84%

“…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%

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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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Section: Ternary Systems Based On Pe Matrix: Influence Of Different Imentioning

confidence: 84%

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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“…O processo de difusão (D), por sua vez, é afetado, também, pela presença de volume livre, pelo grau de cristalinidade da matriz polimérica, uma vez que a difusão ocorre exclusivamente na fase amorfa do polímero [4] . Além disso, a difusão também é afetada pela tortuosidade [5,6] na matriz polimérica, gerado nesse caso pela presença de cargas inorgânicas que, de acordo com a maneira que está distribuída e dispersa, aumenta o caminho livre médio para a difusão.…”

Section: -Avaliação Comparativa Entre Os Nanocompósitos De Argila Motunclassified

Avaliação comparativa entre os nanocompósitos de argila motmorilonita/LLDPE e com Hexaniobato de Potássio/LLDPE: Caracterização das propriedades mecânicas e de transporte

Komatsu¹,

Otaguro²,

Filho³

2014

Polímeros

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Resumo: Nanocompósitos de LLDPE/argila montmorilonita e LLDPE/niobato organofilizado foram obtidos através da diluição de um concentrado da respectiva carga em uma extrusora dupla rosca obtendo-se concentrações finais de 1,5 a 10,0% em carga. No presente estudo utilizou-se o ensaio mecânico de tração e o de permeação ao vapor de água e ao oxigênio para caracterizar estes nanocompósitos. No ensaio mecânico de tração observou-se aumento no valor do módulo elástico e diminuição no valor da tenacidade com o aumento da concentração da argila montmorilonita, o que era esperado devido à rigidez da carga. Comportamento semelhante também foi observado no caso dos nanocompósitos de niobato organofilizado, porém de maneira menos acentuada devido à estrutura química do niobato de potássio. Com auxílio do MEV/FEG observou-se que a distribuição da argila é superior a do niobato organofilizado para concentrações inferiores a 10,0% de carga. No ensaio de permeação ocorre diminuição no valor de permeabilidade com o aumento da concentração da argila montmorilonita para ambos os gases utilizados. Na presença do niobato organofilizado observa-se diminuição, seguido de aumento no valor da permeação com o aumento da concentração da carga para ambos os gases utilizados. Além disso, observou-se que a polaridade do gás utilizado é um fator importante no processo de difusão através do nanocompósito. Palavras-chave: Nanocompósito, polietileno linear de baixa densidade, argila montmorilonita, hexaniobato de potássio, propriedade mecânica e propriedade de transporte de gás. Comparative Evaluation between Montmorillonite Clay/LLDPE and Potassium Hexaniobate/LLDPE Nanocomposites: Characterization of Mechanical and Transport PropertiesAbstract: Linear low density polyethylene-montmorillonite clay and linear low density polyethylene-organophilic niobate nanocomposites were obtained from dilution of masterbatch with 20% w/w of fillers in the LLDPE matrix by melt intercalation using a twin-screw extruder, obtaining nanocomposites with 1.5% up to 10.0% w/w of filler. In this study mechanical and water vapor and oxygen permeation tests were used to characterize the nanocomposites. In mechanical tests an increase of modulus values and decrease of toughness value by increasing concentration of montmorillonite clay were observed. The behavior of LLDPE-organophilic niobate nanocomposites was similar to LLDPE-montmorillonite clay nanocomposites but softer due to hexaniobate structure. The distribution of the organoclay is more homogeneous than organophilic niobate to concentrations below 10.0% filler using the SEM/ FEG. It is possible to see a decrease in the permeability value with increasing concentration of montmorillonite clay for both gases used. In the LLDPE-organophilic niobate nanocomposites a decrease of permeability value occurs followed by an increase of permeability value for both gases used, with increasing concentration of organophilic niobate. Furthermore, it was observed that the polarity of the gas used is an important factor in the dif...

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“…Results are presented in Table 3. Properties studied were the melting temperature (T m ), the heat of fusion (H m ) during PE melting and the degree of crystallinity (X c ), where enthalpy of melting of pure crystalline PE is 279 J g -1 [18].…”

Section: Structure Analysismentioning

confidence: 99%

Thermal properties of nanocomposites based on polyethylene and n-heptaquinolinum modified montmorillonite

Olewnik

Garman

Piechota

et al. 2012

J Therm Anal Calorim

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The aim of the research was obtaining and application of smectic clay modifying agent. The organophilic clay is used as nanofiller in polymer nanocomposites [1]. A microwave-assisted reaction led to obtaining N-heptaquinolinum, which is amphiphilic compound, containing both hydrophobic (alkyl and aromatic) and hydrophilic sections in its structure [2]. N-heptaquinolinum was used as a montmorillonite clay modifying agent. Modification was carried out in formulated way [3,4]. Modification efficiency was determined by X-ray diffraction (XRD) analysis and elementary analysis. Organophilic clay (Ch7) was introduced, using the extrusion method, into polyethylene matrix in different mass relations (1.5, 3 and 5 %) [3]. The structure of obtained materials was studied by means of XRD and SEM. To evaluate potential applications thermal properties of received nanocomposites were tested with thermogravimetric analysis and differential scanning calorimetry. The thermal stability of PE/clay composites can be improved in the case of loading 1.5 and 5 mass%.

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Intercalated linear low density polyethylene (LLDPE)/clay nanocomposites prepared with oxidized polyethylene as a new type compatibilizer: Structural, mechanical and barrier properties

Cited by 183 publications

References 49 publications

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

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

Avaliação comparativa entre os nanocompósitos de argila motmorilonita/LLDPE e com Hexaniobato de Potássio/LLDPE: Caracterização das propriedades mecânicas e de transporte

Thermal properties of nanocomposites based on polyethylene and n-heptaquinolinum modified montmorillonite

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