Characterization and tensile properties of ternary blends with PA‐6 nanocomposites

Contreras, V.; Cafiero, M.; Silva, S. Da; Rosales, Carmen; Perera, R.; Matos, Mireya

doi:10.1002/pen.20572

Cited by 38 publications

(30 citation statements)

References 30 publications

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“…Nanocomposites based on polyethylene (PE) and polyamide (PA) blends have also been studied. 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].…”

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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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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“…An increase in the tensile strength and Young's modulus results from combination compensates for the decrease in toughness and elongation at break values because of their lower Young's modulus compared with the matrix. 20,21 The same behavior was exhibited, both for toughness and strength, by all the samples regardless of the preparation method. Tensile strength is affected by the presence of the organoclay in the polymer matrix.…”

Section: Mechanical Propertiesmentioning

confidence: 55%

“…Lower interfacial tension results in smaller elastomeric domains because of the reduced coalescence rate of the particles. 20 Toughness of the nanocomposites is also enhanced as uniform distribution of the elastomeric domain sizes, a specific interparticulate distance, and an optimum domain size are obtained. Shear stress, melt elasticity, melt viscosity, and a low modulus ratio between the elastomer and polymer matrix aid distribution of the elastomeric domains in the matrix homogeneously rather than leading to large particles that prevent improvements in the toughness.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

Comparison of polyamide 66–organoclay binary and ternary nanocomposites

Mert

Yilmazer

2009

Adv Polym Technol

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Polyamide 66-Lotader ® 2210 blends (95/5 w/w), polyamide 66-Cloisite ® 15A binary nanocomposites (98/2 w/w), and polyamide 66-Lotader ® 2210-Cloisite ® 15A ternary nanocomposites (93/5/2 w/w) were prepared by twin-screw extrusion, and the changes in mechanical properties, morphology, and flow properties of the materials prepared by different mixing sequences were investigated in this study. Lotader ® 2210, which is a random terpolymer of ethylene, butyl acrylate, and maleic anhydride, was used as the impact modifier for polyamide 66 blends as well as polyamide 66 based nanocomposites. The best dispersion level, highest mechanical properties, highest viscosity values, and smallest elastomeric domain sizes were obtained for the mixing sequence in which all the components forming the ternary nanocomposites were compounded simultaneously. Incorporation sequence of either the organoclay or the impact modifier into the polymeric matrix was varied in the other mixing sequences, and this resulted in poorer distribution of the organoclay platelets and elastomeric domains in the matrix owing to insufficient shear intensity applied on the components in a single extrusion step. Toughness values of the ternary nanocomposites were improved compared with the binary nanocomposites upon addition of the impact modifier into polymer-organoclay combination. It was concluded that the compounding sequence of the components plays a significant role in the dispersion of organoclay and the Correspondence to: Miray Mert;

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“…The reduction in impact toughness could be attributed to the immobilization of the macromolecular chains by the clay layers, which limited their ability to adapt to the deformation and make plastic deformation of the polymer matrix more small. 47 On the contrary, because with no clay layers in the rubber phase, core-shell latex particles can easily cavitate and promote matrix plastic deformation. So compared with nylon 6/core-shell latex binary blends, the impact toughness of nylon 6/core-shell latex/clay ternary blends was not drastically decreased.…”

Section: Mechanical Propertiesmentioning

confidence: 98%

Facile preparation of nylon 6 nanocomposites based on clay reinforcement and core‐shell latex toughening: Morphology, properties, and impact fracture behavior

Sun

Wang

et al. 2011

J of Applied Polymer Sci

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This work is focused on a facile route to prepare a new type of nylon 6-based nanocomposites with both high fracture toughness and high strength. A series of nylon 6-matrix blends were prepared via melting extrusion by compounding with poly (methyl methacrylate-co-butadiene-co-styrene) (MBS) or poly(methyl methacrylate-co-methylphenyl siloxane-co-styrene) (MSIS) latices as impact modifier and diglycidyl ether of bisphenol-A (DGEBA) as compatibilizer. Layered organic clay was also incorporated into above nylon 6 blends for the reinforcement of materials. Morphology study suggests that the MBS or MSIS latex particles could achieve a mono-dispersion in nylon 6 matrix with the aid of DGEBA, which improves the compatibilization and an interfacial adhesion between the matrix and the shell of MBS or MSIS. High impact toughness was also obtained but with a corresponding reduction in tensile strength and stiffness. A moderate amount of organic clay as reinforcing agent could gain a desirable balance between the strength, stiffness and toughness of the materials, and tensile strength and stiffness could achieve an improvement. This suggests that the combination of organic clay and core-shell latex particles is a useful strategy to optimize and enhance the properties of nylon 6. Morphology observation indicates that the layered organic clay was completely exfoliated within nylon 6 matrix. It is found that the core-shell latex particles and the clay platelets were dispersed individually in nylon 6 matrix, and no clay platelets were present in MBS or MSIS latex particles. So the presence of the clay in nylon 6 matrix does not disturb the latex particles to promote high fracture toughness via particle cavitation and subsequent matrix shear yielding, and therefore, provides maximum reinforcement to the polymer.

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Characterization and tensile properties of ternary blends with PA‐6 nanocomposites

Cited by 38 publications

References 30 publications

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

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

Comparison of polyamide 66–organoclay binary and ternary nanocomposites

Facile preparation of nylon 6 nanocomposites based on clay reinforcement and core‐shell latex toughening: Morphology, properties, and impact fracture behavior

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