Solid-state microcellular foaming of PE/PE composite systems, investigation on cellular structure and crystalline morphology

Khorasani, Manouchehr; Ghaffarian, Seyed Reza; Goldansaz, Seyed Hadi; Mohammadi, Naser; Babaie, Amir

doi:10.1016/j.compscitech.2010.07.009

Cited by 21 publications

(15 citation statements)

References 34 publications

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“…Beginning of 1990 could be considered as the start point of the great attention to the polymer nanocomposites . For a decade, there was increasing activities toward the using of polymers as the matrices for nanoparticles either in fundamental research or in industrial exploitation . These studies showed that addition of nanofiller generally improved the mechanical properties, heat distortion temperature, and barrier properties, and reduced flammability …”

Section: Introductionmentioning

confidence: 99%

Structural, rheological, and mechanical properties of PA6/SAN/SEBS ternary blend/organoclay nanocomposites

Babaei

Ahmad

2015

J of Applied Polymer Sci

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The aim of this study was to investigate the effect of nanoclay addition on the morphological and mechanical properties of PA6/SAN/SEBS ternary blend. Two different nanoclays with different modifiers and two different mixing sequences were used to investigate the role of thermodynamic and kinetic, respectively, in the nanoclays localization. XRD, SEM, TEM, melt rheology, tensile and Izod impact tests were used to characterize the nanocomposites. Results of characterization of nanocomposites showed that clay localization is a very influential parameter to determine the type of morphology and, consequently, mechanical properties of ternary/clay nanocomposites. It was demonstrated that presence of nanoclay in the matrix results in the increase of stiffness, while localization of nanoclay at the interface improves the toughness and tensile strength.

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Section: Introductionmentioning

confidence: 99%

Structural, rheological, and mechanical properties of PA6/SAN/SEBS ternary blend/organoclay nanocomposites

Babaei

Ahmad

2015

J of Applied Polymer Sci

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“…In past decades, microcellular foams have drawn a great deal of interest because they provide not only substantial weight reduction in plastics for significant material and cost saving but also good product strength due to large numbers of cells with a size smaller than the critical flaws in the polymer . Some studies demonstrated that the microcellular structure even enhanced the resistance to crack propagation . Conventional foams are generally obtained by the addition of a chemical blowing agent or a physical blowing agent (PBA).…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic polyurethane microcellular fibers via supercritical carbon dioxide based extrusion foaming

Dai

Zhang

Huang

et al. 2013

Polymer Engineering & Sci

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This study aims to develop, for the first time, thermoplastic polyurethane (TPU) microcellular composite fibers via an extrusion foaming process using supercritical CO2 as a blowing agent. Results showed that by employing organically modified montmorillonite clay nanoparticles (CloisiteTR 20A) in the matrix at an optimal concentration of about 1.0 wt%, the nucleation rate of foaming was enhanced, thus resulting in the formation of small bubbles in the extruded fibers. Cell sizes as low as several microns or even submicron and fiber diameters less than 30 μm were obtained in the present study. When processed with 0.5 wt% of a slip agent (Oleamide TR121), the extruded TPU fiber foams exhibited fewer cells near the fiber surface. Mechanical studies showed that the tensile modulus per mass based on the initial slope of the stress–strain curve remained almost the same for both unstretched and stretched fibers with or without foaming. However, the yield stress and the maximum tensile load at an equal mass basis were lower for fibers with foaming. POLYM. ENG. SCI., 53:2360–2369, 2013. © 2013 Society of Plastics Engineers

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“…To improve the SEM image, a permanganate etching technique was used, as described in our previous works. [22,29] Figure 5 demonstrates the formation of a thick TC layer around UHMWPE fiber in the case of having HDPE-g-MA as compatibilizer.…”

Section: Mechanical and Dynamic Mechanical Propertiesmentioning

confidence: 98%

“…This new class of material was introduced by our research group as the so-called "nano-homocomposites." [22] In this new three-phase composite, the main reinforcing phase are continuous fibers. In an already published paper, [5] we investigated the effect of various clay loadings on the interfacial and mechanical properties of PE nano-homocomposites, and in this study we aim to investigate the influence of the quality of clay dispersion, through using two different forms of compatibilizers and also a sample without compatibilizer, on the interfacial features and, consequently, on the mechanical properties of PE homocomposites.…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Density Polyethylene Nanocomposite Compatibilizer Type on the Interfacial Adhesion and Mechanical Properties of Polyethylene Nano-Homocomposites

Vasafi

Babaei

Abdolrasouli

2014

Journal of Macromolecular Science, Part B

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In this paper, the effect of nanocomposite compatibilizer type on the interfacial adhesion and mechanical properties of new class of polyethylene (PE) homocomposites, comprising PE/clay nanocomposites as matrix and ultra high molecular weight polyethylene (UHMWPE) fibers as reinforcement, was investigated. These were manufactured by a combination of powder impregnation and film stacking methods, introduced in previous research. Three types of high-density polyethylene (HDPE) Nanocomposites were prepared based on the various compatibilizers used: (i) nanocomposites containing HDPE-grafted maleic anhydride (HDPE-g-MA) as compatibilizer of clay and HDPE matrix, (ii) linear low-density polyethylene-grafted maleic anhydride (LLDPE-g-MA) used as compatibilizer, and (iii) nanocomposites without any compatibilizer. The effects of the presence and compatibilizer type on the quality of clay dispersion, and also the interface features of HDPE-nanocomposite and UHMWPE fibers were investigated and compared with each other. The results demonstrated that the kind of compatibilizer was an important factor determining the dispersion state of clay platelets, and influenced the UHMWPE fiber-PE matrix interface adhesion and the mechanical properties of the PE nano-homocomposites.

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Solid-state microcellular foaming of PE/PE composite systems, investigation on cellular structure and crystalline morphology

Cited by 21 publications

References 34 publications

Structural, rheological, and mechanical properties of PA6/SAN/SEBS ternary blend/organoclay nanocomposites

Structural, rheological, and mechanical properties of PA6/SAN/SEBS ternary blend/organoclay nanocomposites

Thermoplastic polyurethane microcellular fibers via supercritical carbon dioxide based extrusion foaming

Effect of High-Density Polyethylene Nanocomposite Compatibilizer Type on the Interfacial Adhesion and Mechanical Properties of Polyethylene Nano-Homocomposites

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