The role of organoclay in promoting co-continuous morphology in high-density poly(ethylene)/poly(amide) 6 blends

Filippone, Giovanni; Dintcheva, Nadka Tzankova; Acierno, Domenico; Mantia, Francesco Paolo La

doi:10.1016/j.polymer.2008.01.045

Cited by 124 publications

(113 citation statements)

References 61 publications

(33 reference statements)

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“…Moreover, it is interesting to note that, despite PA6 is the minor polymeric phase, the filler is mainly located inside the PA6 phase and at HDPE/PA6 interface. This is in agreement with the observation of other authors on similar systems and can be reasonably explained considering that, despite the presence of the organic modifier, the clay is essentially a polar component that, therefore, tends to migrate to the polar part of the blend [39].…”

Section: Transmission Electron Microscopy (Tem)supporting

confidence: 93%

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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Section: Transmission Electron Microscopy (Tem)supporting

confidence: 93%

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

Scaffaro¹,

Botta²,

Mistretta³

et al. 2013

Express Polym. Lett.

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“…Pseudoplastic behavior at frequencies above 10° rad/s and decreasing complex viscosity at higher frequencies were observed for all samples. These behaviors are due to the hydrodynamic effect of the nanofiller in the melted polymer; similar effects are observed in conventional composites [21][22][23] . In this work, the PP chains are expected to relax fully and exhibit terminal behavior similar to linear polymers with scaling relations of approximately G'-ω 2 and G''-ω 1 at low frequencies at the experimental temperature [24] .…”

Section: Ferreira C I Et Al -Morphological Viscoelastic and Mechsupporting

confidence: 59%

Morphological, viscoelastic and mechanical characterization of polypropylene/exfoliated graphite nanocomposites

Ferreira¹,

Bianchi²,

Oviedo³

et al. 2013

Polímeros

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Abstract:The viscoelastic, mechanical and morphological properties of polypropylene/exfoliated graphite nanocomposites with different contents of nanofiller were investigated. According to transmission electron microscopy results, the nanofiller particles were homogeneously dispersed in the matrix. The rheological properties indicated that incorporation of graphite improved the matrix stiffness and had a reinforcing effect. Exfoliated graphite had a weak interaction with the polypropylene. The behavior of the nanocomposites was similar to that of polypropylene in terms of the interfacial detachment inferred from the transmission electron microscopy images and of their G' (storage) and G'' (loss) moduli, and viscosity. The mechanical properties of the nanocomposites compared to the matrix improved significantly for the flexural and storage moduli with little loss of impact strength.

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“…Gahleitner et al [17] , estudando o sistema PP/PA6/argila, observaram o aumento do módulo e redução na resistência ao impacto em comparação com a blenda PA6/PP e os polímeros puros, e que a argila ficou localizada na fase de PA6. Filippone et al [18] , estudando o sistema Polietileno de Alta Densidade (PEAD)/PA6/argila, verificaram que não há melhora na adesão entre as fases de PEAD e PA6 com a adição da argila e que esta ficou localizada na fase de PA6. Filippi et al [19] estudando o sistema PA6/polietileno de baixa densidade (PEBD)/argila contendo o compatibilizante estireno-etilenobutadieno-estireno enxertado com anidrido maléico (SEBSgMA), observaram que com a adição da argila e do SEBSgMA à blenda PA6/PEBD ao mesmo tempo, e em proporções apropriadas, é possível a obtenção de um nanocompósito com balanço satisfatório entre a rigidez e a tenacidade.…”

Section: Difração De Raios-x (Drx)unclassified

Desenvolvimento de nanocompósitos a partir de blendas com matriz de PA6

Agrawal¹,

Araújo²,

Mélo³

2011

Polímeros

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Resumo: Neste trabalho foram desenvolvidos nanocompósitos de polímero/argila a partir de blendas com matriz de PA6. Inicialmente foi avaliado por reometria de torque a reatividade dos copolímeros funcionais PEgAA, PEgMA e EG com a PA6 e a influência destes no sistema PA6/argila. Os ensaios de reometria de torque mostraram que o copolímero PEgAA foi o que apresentou maior reatividade com a PA6. Já nos sistemas de PA6/Argila, o copolímero EG foi o que apresentou a maior interação com o sistema PA6/argila corroborado pelo aumento do torque em função do tempo. Os nanocompósitos foram caracterizados por Difração de Raios-X (DRX), Calorimetria Exploratória Diferencial (DSC), propriedades mecânicas e Microscopia Eletrônica de Varredura (MEV). Os resultados de DRX indicaram que o sistema PA6/CL20A apresentou estrutura intercalada enquanto que os sistemas PA6/EG/CL20A apresentaram estrutura parcialmente esfoliada. Os ensaios de DRX e DSC indicaram que no sistema PA6/EG/CL20A onde a argila foi pré-intercalada na PA6, a mesma ficou localizada na fase de PA6 enquanto que no sistema onde a argila foi pré-intercalada no copolímero EG a mesma ficou localizada na fase de EG. O sistema PA6/EG/CL20A onde a argila foi pré-intercalada na PA6 apresentou propriedades de módulo e resistência ao impacto balanceadas quando comparadas às da PA6. Os ensaios de MEV indicaram que a argila está bem dispersa nos sistemas PA6/CL20A e PA6/EG/CL20A. Palavras-chave: Poliamida 6, blendas poliméricas, nanocompósitos. Development of Nanocomposites from Blends with PA6 MatrixAbstract: In this work polymer/clay nanocomposites from blends with PA6 matrix were developed. Torque rheometry was used to evaluate the reactivity of different copolymers with PA6 and their influence on the PA6/clay system. The nanocomposites were characterized by X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), mechanical properties and Scanning Electron Microscopy (SEM). Torque rheometry analysis showed that the PEgAA copolymer exhibited the highest reactivity with PA6 while the EG copolymer showed better interaction with the PA6/Clay system. XRD results indicated that PA6/CL20A system presented intercalated structure, while PA6/ EG/CL20A systems presented a partially exfoliated structure. XRD and DSC analyses indicated that PA6/EG/CL20A system where the clay was pre-intercalated in PA6, the clay was located in the PA6 phase while in the system where the clay was pre-intercalated in the EG copolymer, the clay was located in the EG phase. The PA6/EG/CL20A system where the clay was pre-intercalated into PA6 presented balanced modulus and impact strength properties when compared to PA6. SEM tests showed that the clay is well dispersed in the PA6/ CL20A and PA6/EG/CL20A systems. Keywords: Polyamide 6, polymer blends, nanocomposites. IntroduçãoCom a crescente demanda por novos materiais, as blendas poliméricas, misturas de dois ou mais polímeros ou copolímeros, surgiram como alternativa a síntese de novos polímeros. Entretanto, como a maioria das blendas é imiscíve...

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The role of organoclay in promoting co-continuous morphology in high-density poly(ethylene)/poly(amide) 6 blends

Cited by 124 publications

References 61 publications

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

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

Morphological, viscoelastic and mechanical characterization of polypropylene/exfoliated graphite nanocomposites

Desenvolvimento de nanocompósitos a partir de blendas com matriz de PA6

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