Compatibilized polyamide 6/polyethylene blend–clay nanocomposites: Effect of the degradation and stabilization of the clay modifier

Scaffaro, R.; Mistretta, Maria Chiara; Mantia, Francesco Paolo La

doi:10.1016/j.polymdegradstab.2008.04.008

Cited by 61 publications

(43 citation statements)

References 49 publications

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“…Because pristine clay is not compatible with most polymers due to its hydrophilic nature, it must be chemically modified to render its surface more hydrophobic. The most popular surface treatment is ion exchange of the clay with organic ammonium cations, which not only renders its surface more hydrophobic but also expands the spaces between the silicate layers [17,81]. Modification of clay using various different types of organic modifiers plays an important role for the enhancement of stiffness and strength.…”

Section: 3mentioning

confidence: 99%

“…The final aim is to promote synergism among the immiscible polymer pairs to form blends with enhanced or new, tailored properties with respect to the parent components. Normally, a compatibilization step is needed to improve the otherwise weak interfacial adhesion and to reduce the morphological instability of the straight blends [81]. A compatibilizer is usually added into immiscible polymer blends to intensify the interfacial strength because it has similar chain structures to the two components of the polymer blend or it reacts with one component via the functional groups (sometimes forming hydrogen bonds).…”

Section: Effects Of Polymeric Compatibilizer On Thementioning

confidence: 99%

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Polyamide blend-based nanocomposites: A review

Chow¹,

Ishak

2015

Express Polym. Lett.

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Section: 3mentioning

confidence: 99%

Section: Effects Of Polymeric Compatibilizer On Thementioning

confidence: 99%

Polyamide blend-based nanocomposites: A review

Chow¹,

Ishak

2015

Express Polym. Lett.

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“…In particular, the effect of the composition and of filler level was investigated [19][20][21][22][23][24]. In our previous works we presented the properties of high density polyethylene (HDPE) and polyamide 6 (PA6) blends containing an organically modified montmorillonite (OMM) [25,26]. We evaluated the effect of different compatibilizing systems on the properties of the blends.…”

Section: Introductionmentioning

confidence: 99%

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Scaffaro¹,

Botta²,

Mistretta³

et al. 2013

Express Polym. Lett.

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Abstract. In this work, we studied the effect of the method of preparation and of reprocessing on the morphology and, consequently, on the physical properties of polyamide 6 (PA6)/ high density polyethylene (HDPE)-clay nanocomposite blends in the presence of different compatibilizers. In particular, the nanocomposites were obtained by melt mixing using a corotating twin screw extruder (E1). The blends thus obtained were re-extruded (E2) under the same operating conditions. Moreover, blends with the same final composition were produced using a masterbatch of the compatibilizer with the clay prepared in a separated stage in a batch mixer (MB). All the materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD) analyses. In addition, the rheological behaviour and the, tensile and impact, properties were evaluated. The XRD and TEM analysis showed that re-extrusion slightly improves the morphology of the nanocomposites. A further improvement of the morphology, in terms of lower clay dimension and better dispersion, was observed in the MB blends. The results of the mechanical tests showed that reprocessing (E2) induced an increase of all the properties for all the three systems. A further general increase of the mechanical properties was showed by the MB blends.

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“…A morfologia dos nanocompósitos com PE-g-MA, Figura 1d foi similar à estrutura da respectiva blenda, Figura 1b, destacando o efeito do agente compatibilizante. Scafarro et al [15] também obtiveram em seus estudos morfologia mais homogênea e com menores domínios em nanocompósitos de PEAD/PA6/argila com a inserção do agente compatibilizante. Associa-se este efeito à supressão da coalescência dos domínios causado pelas nanocamadas da argila e não pela indução da quebra dos domínios da fase dispersa [19] .…”

Section: -Efeito Da Montmorilonita Organifílica Na Compatibilização Eunclassified

“…Destacase um grande avanço nas pesquisas com blendas e nanoargilas nas instituições brasileiras [11][12][13] demonstrando principalmente o comportamento mecânico e reológico para estes materiais. Já os estudos da capacidade de compatibilização das argilas organofílicas em blendas imiscíveis não foram encontrados na literatura nacional e têm sido pouco citados na literatura [14,15] . Uma blenda compatível de poliamida e polietileno seria uma alternativa interessante devido às diferentes propriedades destes polímeros.…”

Section: Introductionunclassified

Efeito da Montmorilonita Organifílica na Compatibilização e nas Propriedades Morfológicas, Mecânicas e Térmicas de Blendas de PA6/ PEBD

Coelho¹,

Morales²

2013

Polímeros

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Resumo: Blendas imiscíveis de poliamida 6 e polietileno de baixa densidade foram preparadas com e sem a presença de polietileno enxertado com anidrido maleico como compatibilizante. Montmorilonita organofílica foi incorporada nas blendas por intercalação do fundido. Análises morfológicas e estruturais apresentaram boa dispersão da argila, com a obtenção de estruturas intercaladas e esfoliadas. A separação de fases foi observada nas amostras, e tanto o compatibilizante como a argila causaram redução no tamanho dos domínios. Esta estrutura proporcionou uma melhora significativa nas propriedades mecânicas das blendas, revelando o efeito de reforço causado pela argila. O módulo elástico e a tensão máxima aumentaram em até 300% e 100%, respectivamente. O efeito da compatibilização da argila foi positivo. Pelas análises de DSC pode-se observar o surgimento de um pico na região de fusão da PA6 atribuído à formação de uma nova fase cristalina devido à presença de argila. Palavras-chave: Nanocompósitos, blendas, montmorilonita, polietileno, poliamida. The Effect of Organophilic Montmorillonite on Compatibilization, Morphology and Mechanical and Thermal Properties of PA6/ LDPE BlendsAbstract: Immiscible blends of polyamide 6 and low density polyethylene were prepared with and without maleic anhydride grafted polyethylene used as a compatibilizer. Organophilic montmorillonite was incorporated in the blends by melt intercalation. Morphological and structural analysis showed good clay dispersion with partially exfoliated and intercalated structures. Phase separation was observed and domains size reduction was induced by the clay and the compatibilizer. Improvement on mechanical properties of compounds was observed, showing the reinforcing effect caused by the clay. Elastic modulus and tensile strength have increased up to 300% and 100%, respectively. The clay showed a positive effect on compatibilization. DSC analysis revealed a new melting peak for PA6 assigned to a new crystalline phase due the clay effect.

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Compatibilized polyamide 6/polyethylene blend–clay nanocomposites: Effect of the degradation and stabilization of the clay modifier

Cited by 61 publications

References 49 publications

Polyamide blend-based nanocomposites: A review

Polyamide blend-based nanocomposites: A review

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Efeito da Montmorilonita Organifílica na Compatibilização e nas Propriedades Morfológicas, Mecânicas e Térmicas de Blendas de PA6/ PEBD

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