Effect of Blend Composition on the Structure-Properties Relationships of Nanostructured Polymer Composites From Polycondensate/Polyolefin Blends

Friedrich, K.; Fakirov, S.; Evstatiev, O.

doi:10.1080/00914030490277734

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…7) exhibit the in situ PET/CNT microfiber structure formed in HDPE phase for all composites. However, the structure and concentration of the microfibers are different for all compositions [28,29]. The changes in the surface structure of the microfibers are due to the diversity in the amounts of CNT in PET phase for various composite systems.…”

Section: Morphology Studiesmentioning

confidence: 99%

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Yeşil

Köysüren

Bayram

2010

Polymer Engineering & Sci

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In situ microfiber reinforced conductive polymer composites consisting of high-density polyethylene (HDPE), poly(ethylene terephthalate) (PET), and multiwalled carbon nanotube (CNT) were prepared in a twin screw extruder followed by hot stretching of PET/CNT phase in HDPE matrix. For comparison purposes, the HDPE/PET blends and HDPE/PET/CNT composites were also produced without hot stretching. Extrusion process parameters, hot-stretching speed, and CNT amount in the composites were kept constant during the experiments. Effects of PET content and molding temperature on the morphology, electrical, and mechanical properties of the composites were investigated. Morphological observations showed that PET/CNT microfibers were successfully formed in HDPE phase. Electrical conductivities of the microfibrillar composites were in semi-conductor range at 0.5 wt% CNT content. Microfiber reinforcement improved the tensile strength of the microfibrillar HDPE/PET/CNT composites in comparison to that of HDPE/PET blends and HDPE/ PET/CNT composites prepared without hot stretching POLYM. ENG. SCI., 50:2093-2105, 2010. ª 2010 Society of Plastics Engineers INTRODUCTIONRecently, there is a great interest in industry on electrically semiconductor materials with superior mechanical properties and thermal stability [1]. Especially, conductive polymer composites have received significant attention for use in various engineering applications such as sensors, antistatic coatings, electromagnetic interference shielding, and electrolytes in the fuel cells [2,3]. They are generally a synergetic combination of conductive filler and insulating polymer matrix. They exhibit a series of unique features, such as a percolation phenomenon, sensitivity to pressure, temperature and gas, improved mechanical and thermal properties.Conductive polymer composites are usually prepared by incorporating conductive fillers into polymer matrix through melt mixing either by using an extruder or an internal mixer. However, to obtain high electrical conductivity with this method, high loadings of the conductive fillers are usually required, which may result in poor mechanical properties and high cost [4][5][6][7][8]. In the literature, several processing techniques have been used to lower the percolation threshold, in which electrical conductivity of composite increases by several orders of magnitude with the formation of current conductive structures [2]. These techniques are in situ polymerization of the polymer in the presence of conductive particles [9] and selective localization of conductive filler in one of the phases or at the interface of a polymer blend composed of two polymer constituents, in which filler forms the conductive network in the dispersed phase. This phase also constitutes continuous conductive structure in the major phase, which is called as double percolation [10][11][12]. However, in situ polymerization technique is hard to apply in the industrial scale, and in the second technique the incompatible nature of the polymer constituents of th...

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Section: Morphology Studiesmentioning

confidence: 99%

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Yeşil

Köysüren

Bayram

2010

Polymer Engineering & Sci

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“…Magnetic nanofibers can be used for various purposes such as in data storage, bulletproof vest, drug delivery system, tissue engineering, and composite reinforcement. Mechanical properties of composites increase with the incorporation of nanofibers into the polymer matrix due to imbibitions of the stress by the fibers [2,3]. Magnetic nanoparticles react easily to any external field, and such property will enhance its application in sensors and intelligent equipments [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Process Factors on Diameter of Core (γ-Fe₂O₃)/Shell (Polyvinyl Alcohol) Structure Magnetic Nanofibers During Co-Axial Electrospinning

Fallahiarezoudar¹,

Ahmadipourroudposht²,

Yusof³

et al. 2014

International Journal of Polymeric Materials and Polymeric Biom

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In this study, magnetic nanofibers were fabricated using polyvinyl alcohol (PVA) as a shelter for (c-Fe 2 O 3 ) magnetic nanoparticles suspension. Two-level full factorial experiments with center and augmented axial points were performed where process parameters studied were flow rate, applied voltage, distance between needle and collector, and collector rotating speed. The response variables analyzed were morphology and fiber diameter distribution. The model obtained from the experimental design revealed that the flow rate, voltage, the two-way interaction of these factors and the second order effect of flow rate-A 2 were significant in determining nanofiber diameters. Nanofibers with smaller diameters tend to have higher tensile strength contributed by the better alignment of lamellae along the fibers axis and molecular orientation. The fabricated (c-Fe 2 O 3 )=PVA nanofibers were ultra-fine with nano size diameter within the range of approximately 280-500 nm.

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“…Polymer blending has been a most useful method for the improvement or modification of the physicochemical properties of polymer materials [4][5][6][7][8][9][10][11][12]. An important property of the polymer blend is the miscibility of its ingredients, because it affects the mechanical properties, the morphology, its permeability and degradation [4,13].…”

Section: Introductionmentioning

confidence: 99%

Structure and Performance of Poly(vinyl alcohol)/Poly(γ-benzylL-glutamate) Blend Membranes

Zhu

Gao

Wang

et al. 2011

International Journal of Polymeric Materials

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Poly(vinyl alcohol) (PVA)=poly(c-benzyl L-glutamate) (PBLG) blend membranes with different PBLG wt contents were prepared by pervaporation. Structure and surface morphologies of PVA=PBLG blend membranes were investigated by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Thermal, mechanical, and chemical properties of PVA=PBLG blend membrane were studied by differential scanning calorimeter (DSC), tensile strength tests, and other physical methods. It was revealed that the introduction of PBLG homopolymer into PVA could exert an outstanding effect on the properties of PVA membrane.

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Effect of Blend Composition on the Structure-Properties Relationships of Nanostructured Polymer Composites From Polycondensate/Polyolefin Blends

Cited by 11 publications

References 16 publications

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Influence of Process Factors on Diameter of Core (γ-Fe₂O₃)/Shell (Polyvinyl Alcohol) Structure Magnetic Nanofibers During Co-Axial Electrospinning

Structure and Performance of Poly(vinyl alcohol)/Poly(γ-benzylL-glutamate) Blend Membranes

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Effect of Blend Composition on the Structure-Properties Relationships of Nanostructured Polymer Composites From Polycondensate/Polyolefin Blends

Cited by 11 publications

References 16 publications

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Effect of microfiber reinforcement on the morphology, electrical, and mechanical properties of the polyethylene/poly(ethylene terephthalate)/carbon nanotube composites

Influence of Process Factors on Diameter of Core (γ-Fe2O3)/Shell (Polyvinyl Alcohol) Structure Magnetic Nanofibers During Co-Axial Electrospinning

Structure and Performance of Poly(vinyl alcohol)/Poly(γ-benzylL-glutamate) Blend Membranes

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Product

Resources

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Influence of Process Factors on Diameter of Core (γ-Fe₂O₃)/Shell (Polyvinyl Alcohol) Structure Magnetic Nanofibers During Co-Axial Electrospinning