Morphology and rheology of (styrene-butadiene rubber/acrylonitrile-butadiene rubber) blends filled with organoclay: The effect of nanoparticle localization

Monfared, Alireza; Jalali‐Arani, Azam

doi:10.1016/j.clay.2015.02.012

Cited by 43 publications

(29 citation statements)

References 44 publications

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“…Many researchers have tried to prevent the aggregation/ agglomeration of nanoparticles which weakens the modulus by improving the compatibility between polymer matrix and nanoparticles through changing the surface chemistry of polymer or nanoparticles or applying a compatibilizer. [ 37,45,46 ] …”

Section: Resultsmentioning

confidence: 99%

A Two‐Step Method Based on Micromechanical Models to Predict the Young's Modulus of Polymer Nanocomposites

Zare

2016

Macro Materials & Eng

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displayed high shape recovery and good recovery speed and stress. [2] The high surface area of nanoparticles as well as the strong interfacial adhesion at nanoscale lead to formation of a different phase between polymer and filler parts as interphase. [3][4][5][6][7][8][9] The contribution of interphase to mechanical properties of nanocomposites is considerable, due to the high interfacial area at polymernanoparticles interfaces. [10][11][12][13][14][15][16][17][18][19][20] It was reported that the interphase volume fraction exceeds the nanoparticle volume fraction in some samples demonstrating that the mechanical properties are significantly improved by both nanoparticles and interphases. [21] Therefore, many researchers have studied the interphase properties and its contribution to the mechanical properties of polymer nanocomposites. [22,23] Joshi and Upadhyay [24] modeled a polymer/multi-walled carbon nanotube (MWCNT) nanocomposite by three phase representative volume element (RVE) including nanoparticles, interphase, and matrix.A two-step method is suggested to predict the Young's modulus of polymer nanocomposites assuming the interphase between polymer matrix and nanoparticles. At first, nanoparticles and their surrounding interphase are assumed as effective particles with core-shell structure and their modulus is predicted. At the next step, the effective particles are taken into account as a dispersed phase in polymer matrix and the modulus of composites is calculated. The predictions of the two-step method are compared with the experimental data in absence and presence of interphase and also, the influences of nanoparticles size as well as interphase thickness and modulus on the Young's modulus of nanocomposites are explored. The predictions of the suggested model show good agreement with the experimental data by proper ranges of interphase properties. Moreover, the interphase thickness and modulus straightly affect the modulus of nanocomposites. Also, smaller nanoparticles create a higher level of modulus for nanocomposites, due to the large surface area at interface and the strong interfacial interaction between polymer matrix and nanoparticles.

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Section: Resultsmentioning

confidence: 99%

A Two‐Step Method Based on Micromechanical Models to Predict the Young's Modulus of Polymer Nanocomposites

Zare

2016

Macro Materials & Eng

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“…As a result, the polymer nanocomposites can be assumed as low-cost substitutes for high-performance materials for many commercial applications such as automotive, household goods, packaging, etc. (Monfared and Jalali-Arani, 2015;Shabanian et al, 2015).…”

Section: Introductionmentioning

confidence: 97%

Estimation of material and interfacial/interphase properties in clay/polymer nanocomposites by yield strength data

Zare

2015

Applied Clay Science

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“…However, if the nanoparticles are located in a single phase other possible mechanisms can be considered: Change in the viscosity of the phases, immobilization of the dispersed drops by the creation of a physical network of particles in the matrix (possible when concentration of solid above the percolation threshold) or the strong interaction of polymer chains onto the solid particles inducing steric hindrance [13,14]. Therefore, the localization of the nanoparticles is a key to understanding the compatibilization mechanism.…”

Section: Introductionmentioning

confidence: 99%

Compatibilization mechanism induced by organoclay in PMMA/PS blends

Genoyer

Yee

Soulestin

et al. 2017

Journal of Rheology

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In this work, the effect of adding organoclay (Cloisite 20A) to a poly(methyl metacrylate) (PMMA)/polystyrene (PS) blend was evaluated in order to understand the compatibilization mechanism taking place. The blend morphology was quantified using micrographs obtained by scanning electron microscopy and observed by transmission electron microscopy. The state of dispersion of the clay was studied using small angle X-ray scattering and wide angle X-ray scattering and by applying the Carreau-Yasuda with a yield stress model to small amplitude oscillatory shear (SAOS) data. Morphological analyses revealed that the clay was intercalated, that its addition resulted in a decrease in the size of the dispersed phase and that it was preferentially located at the interface, except in the case of saturated interfaces, in which case the remaining clay was dispersed in PMMA. By applying the simplified Palierne model to SAOS experiments, the interfacial tension between the polymers forming the blend was inferred and shown to decrease upon addition of clay. The relaxation spectra inferred from the SAOS data, using the Honerkamp and Weese method, revealed four relaxation times: Relaxation of PMMA and PS chains, relaxation of the droplet shape, as well as an additional relaxation phenomenon attributed to the Marangoni stress. Although Marangoni stresses have already been studied in the case of blends compatibilized by block copolymers, this is the first time that it has been evidenced in the case of a clay as compatibilizer. V C 2017 The Society of Rheology. [http://dx

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Morphology and rheology of (styrene-butadiene rubber/acrylonitrile-butadiene rubber) blends filled with organoclay: The effect of nanoparticle localization

Cited by 43 publications

References 44 publications

A Two‐Step Method Based on Micromechanical Models to Predict the Young's Modulus of Polymer Nanocomposites

A Two‐Step Method Based on Micromechanical Models to Predict the Young's Modulus of Polymer Nanocomposites

Estimation of material and interfacial/interphase properties in clay/polymer nanocomposites by yield strength data

Compatibilization mechanism induced by organoclay in PMMA/PS blends

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