Preparation of polyethylene-graft-clay nanocomposites using Friedel–Crafts alkylation reaction as a new method

Pourabed, Amir; Tavakoli, Akram; Pourabbas, Behzad; Aghjeh, Mir Karim Razavi

doi:10.1007/s13726-015-0365-9

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…Modification of polymeric materials is performed in a wide variety of purposes e.g., for imparting desired properties to the composite or to reduce the products cost . However, such modification is often carried out excluding the consideration of acid−base properties of the joined materials and does not always lead to positive results.…”

Section: Introductionmentioning

confidence: 99%

Acid−base properties of polyethylene composites with clays

Kraus

Nguen

Efimova

et al. 2016

J of Applied Polymer Sci

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We report on the surface energy characteristics of composite materials based on low-density polyethylene with addition of bentonite and organic clay. Investigated were the surface free energy, its components and parameters by wetting methods according to Berger, spatial method, and method of nonlinear systems. The determined characteristics were carried out by the selective wetting conditions for the individual constituents of the composition, including the clay powder. The thermal, mechanical, and morphological properties of obtained composites were investigated. The possibility for predicting the surface properties of composite materials based on component-wise analysis was demonstrated.

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Section: Introductionmentioning

confidence: 99%

Acid−base properties of polyethylene composites with clays

Kraus

Nguen

Efimova

et al. 2016

J of Applied Polymer Sci

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“…Naturally occurring layered silicates including montmorillonite (MMT), hectorite, and saponite have received significant attention as reinforcing materials for polymers because of their potentially high aspect ratio and unique intercalation/exfoliation characteristics. 1,2 Proper exfoliation of these layered clay minerals can lead to fine dispersion of nanoclay platelets, resulting in enhanced stiffness and strength, when loaded in polymer matrix. [3][4][5] However, MMT clay doesn't have good interaction characteristics with the polymer matrices, resulting in the poor dispersion and a weak interface.…”

Section: Introductionmentioning

confidence: 99%

Role of silane concentration on the structural characteristics and properties of epoxy-/silane-modified montmorillonite clay nanocomposites

Ryu

Reddy

2016

Journal of Elastomers & Plastics

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In the present work, sodium montmorillonite (MMT) was modified with varying concentrations of (3-amino propyl) triethoxy silane (APS) using water as the dispersing medium. Successful grafting of APS was corroborated using Fourier transform infrared spectroscopy (FT-IR). X-ray diffraction (XRD) studies of silane-modified clay revealed that the average d-spacing values increase at low silane concentration with the almost constant values at higher silane concentration. Total grafting yield of APS calculated using differential thermogravimetric results revealed that grafting yield decreases with increasing silane concentration. Epoxy-based MMT clay nanocomposites were prepared with different loading amounts of pristine (PM 0.0 ) and silylated clay (SM 4.4 ), and its influence on the mechanical, dynamic mechanical, and water uptake properties of the nanocomposites was investigated. The degree of intercalation of pristine or modified clay in the epoxy matrix estimated by XRD experiments exhibits a clear diffraction peak corresponding to the interlayer spacing d 001 of 14.8-28 Å . Characterizations of mechanical properties revealed that Young's modulus and tensile strength increase with increasing concentration of the modified clay, while the fracture toughness shows a maximum at 6 wt% of clay. From the results of dynamic mechanical analysis, it was observed that the nanocomposites filled with silylated clay display higher storage /home/jep modulus mainly at temperatures above the glass transition temperature. The equilibrium water uptake was reduced significantly on loading 6 wt% of pristine MMT, and this effect is more pronounced on loading silanized MMT in the nanocomposites when compared to the neat epoxy system.

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Structure and Properties of Poly(Oxypropylene) Diamine Intercalated Montmorillonite/Epoxy Composites

Zhang²,

Liao

et al. 2019

Journal of Macromolecular Science, Part B

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Preparation of polyethylene-graft-clay nanocomposites using Friedel–Crafts alkylation reaction as a new method

Cited by 3 publications

References 22 publications

Acid−base properties of polyethylene composites with clays

Acid−base properties of polyethylene composites with clays

Role of silane concentration on the structural characteristics and properties of epoxy-/silane-modified montmorillonite clay nanocomposites

Structure and Properties of Poly(Oxypropylene) Diamine Intercalated Montmorillonite/Epoxy Composites

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