Biaxial deformation behavior and mechanical properties of a polypropylene/clay nanocomposite

Abu‐Zurayk, Rund; Harkin‐Jones, Eileen; McNally, Tony; Menary, Gary; Martin, Peter; Armstrong, Cecil

doi:10.1016/j.compscitech.2009.03.014

Cited by 29 publications

(30 citation statements)

References 22 publications

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“…Table 1 shows the XRD results for the Cloisite 15A and the nanocomposite sheets with SRs of 1.0, 1.5, 2.5, 3.0 and 3.5. As reported previously [13], it is observed that the d-spacing has increased slightly from 3.19 nm to 3.27 nm for the compression moulded sheet. When the sheet is stretched the d-spacing reduces again at SR of 1.5 to 2.95 nm and then increases slightly at the higher SRs to 3.13 nm.…”

Section: Tensile Testingsupporting

confidence: 75%

Structure–property relationships in biaxially deformed polypropylene nanocomposites

Abu‐Zurayk

Harkin‐Jones

McNally

et al. 2010

Composites Science and Technology

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Section: Tensile Testingsupporting

confidence: 75%

Structure–property relationships in biaxially deformed polypropylene nanocomposites

Abu‐Zurayk

Harkin‐Jones

McNally

et al. 2010

Composites Science and Technology

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“…Most commonly, enhanced properties have been observed along the direction parallel to the rolling direction (MD) in which the molecules are aligned/oriented, while poorer properties have been observed perpendicular to the molecular orientation (TD). The enhancement in strength along the MD could be due to increased molecular orientation and enhanced clay alignment after rolling [13], as illustrated in Figure 2. Herewith, the anisotropy of the material can be derived from the ratio of strength along the MD to strength along the TD, as presented in Figure 3.…”

Section: Results and Discussion 31 Mechanical Propertiesmentioning

confidence: 99%

“…Generally, the polymer chains tend to orient parallel to the MD with uniaxial rolling process, leading to the enhancement of the mechanical properties [8][9][10][12][13][14][15] as discussed above. Therefore, the investigation upon the orientation of polymer chains is essential to understand the effects of uniaxial cold rolling on the anisotropy of polymers.…”

Section: Microwave Molecular Orientation Analysismentioning

confidence: 99%

“…Although studies on polymer chain orientation are rather abundant, research on the deformation of polymer nanocomposites is rare. Abu-Zurayk et al [13] reported that biaxial hot stretching on the nanocomposites has caused the delamination of clay stacks and orientation of clay. However, there is no relevant work has been reported on the uniaxial cold rolling of polymer nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties and structure development in poly(butylene succinate)/organo-montmorillonite nanocomposites under uniaxial cold rolling

Phua¹,

Chow²,

Ishak³

2011

Express Polym. Lett.

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Abstract. Polymer nanocomposites have potentially enhanced properties when the molecular orientations of the polymer chains can be controlled. In this study, the mechanical and structural properties of poly(butylene succinate) (PBS) and 2wt% organo-montmorillonite (OMMT) filled PBS nanocomposites were modified by uniaxial cold rolling. Cold rolling was carried out to different compression ratios. The mechanical properties of rolled samples were studied in both the machine direction (MD) and the transverse direction (TD). Along the MD, distinct improvements in tensile strength and elongation at break were observed. However, the tensile strength degraded along the TD. Wide angle X-ray diffraction (WAXD) and microwave molecular orientation analysis reported on the degree of molecular orientation after rolling. Further, degree of crystallinity was reduced after cold rolling.

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“…Entretanto, o número de publicações sobre filmes de nanocompósitos PP/argila organofílica para aplicação no setor de embalagens alimentícias é limitado [21][22][23] e a literatura tem mostrado que, ao contrário dos nanocompósitos preparados com matrizes polares como poliamidas, poliésteres e policarbonatos, os preparados com matrizes apolares poliolefínicas não tem apresentado melhoramentos significativos nas propriedades mecânicas e de barreira, o que tem sido atribuído a fraca adesão interfacial polímero/argila [20] . Além disso, nestes estudos, as argilas organofílicas empregadas são geralmente produtos comerciais, tais como Cloisites e Nanomers® fornecidas pela Southern Clay Company e Nanocor, respectivamente [24][25][26][27][28][29][30][31][32] , que são de custo elevado. O uso de argilas organofílicas desenvolvidas com tecnologia nacional para preparação de filmes de nanocompósitos a base de PP poderá promover o desenvolvimento do mercado interno e possibilitar a produção de nanocompósitos mais competitivos no mercado.…”

Section: Introductionunclassified

Desenvolvimento de filmes de nananocompósitos polipropileno/argila organofílica para embalagens

Araújo¹,

Mesquita²,

Canedo³

et al. 2012

Polímeros

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Resumo: Neste trabalho foram preparados filmes de nanocompósitos de polipropileno (PP) contendo 1% em massa de bentonita modificada organicamente com tecnologia nacional (APO). Polipropileno enxertado com anidrido maleico (PP-g-AM) e copolímero de etileno e álcool vinílico (EVOH) foram utilizados como agentes compatibilizantes. Os nanocompósitos foram preparados através da intercalação no estado fundido em extrusora de filme plano. A influência do tipo e do teor de compatibilizante e do tipo de polipropileno, na morfologia, propriedades mecânicas e de barreira ao vapor d'água dos referidos filmes foi investigada. Os dados de difração de raio X evidenciam que apesar da morfologia dos nanocompósitos ter sido afetada pelo tipo de compatibilizante, esta praticamente não variou com o teor de compatibilizante utilizado. As morfologias e as propriedades de barreira ao vapor d'água dos nanocompósitos preparados com os polipropilenos PP H401 e PP H07D-00 são semelhantes. Entretanto, aqueles preparados com PP H07D-00 apresentaram melhores propriedades mecânicas, excetuando a resistência da termossoldagem à tração, do que os preparados com a matriz polimérica PP H401, e a transparência dos nanocompósitos preparados com PP H07D-00 foi idêntica à da matriz polimérica sem argila. Os resultados indicam que os filmes de nanocompósitos PP H07D-00 compatibilizados com 15% de PP-g-AM e contendo 1% de argila organofílica APO podem ser promissores para aplicação em embalagens. Palavras-chave: Filmes de nanocompósitos, argila organofílica, polipropileno, compatibilizante. Development of Polypropylene/Organoclay Nanocomposite Films for PackagingAbstract: This work deals with polypropylene (PP) nanocomposite films containing 1 wt. (%) bentonite clay organically modified with national technology (APO). Maleic anhydride grafted polypropylene (PP-g-MA) and ethylene vinyl alcohol (EVOH) were used as compatibilizing agents. Nanocomposites were prepared by melt intercalation in a flat film extruder. An investigation was made of the influence from the type and content of compatibilizer and type of polypropylene on the morphology, mechanical properties and barrier properties to water vapor of these films. X-ray diffraction data show that while the nanocomposite morphology was affected by the type of compatibilizer, it was relatively insensitive to its content. The morphologies and barrier properties to water vapor of the nanocomposites prepared with the two polypropylenes (PP H401 and PP H07D-00) were similar. However, except for the heat sealing properties, those prepared with PP H07D-00 showed better mechanical properties. The transparency of P715AMAPO nanocomposite was similar to that of the P715AM matrix. The results indicated that PP H07D-00 nanocomposite films compatibilized with 15% PP-g-AM and containing 1% APO organoclay may be promising for packaging applications. Keywords: Nanocomposite films, organoclay, polypropylene, compatibilizer. IntroduçãoCom o advento dos nanocompósitos poliméricos, as indústrias de embalagens vêm vislumbran...

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Biaxial deformation behavior and mechanical properties of a polypropylene/clay nanocomposite

Cited by 29 publications

References 22 publications

Structure–property relationships in biaxially deformed polypropylene nanocomposites

Structure–property relationships in biaxially deformed polypropylene nanocomposites

Mechanical properties and structure development in poly(butylene succinate)/organo-montmorillonite nanocomposites under uniaxial cold rolling

Desenvolvimento de filmes de nananocompósitos polipropileno/argila organofílica para embalagens

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