Melt mixing of carbon fibers and carbon nanotubes incorporated polyurethanes

Abdullah, Sukarnur Che; Iqbal, Azhar; Frormann, Lars

doi:10.1002/app.28479

Cited by 41 publications

(34 citation statements)

References 31 publications

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“…PU/MWCNT composites had been prepared by solution processing, melt-mixing, or in situ polymerization with different types of polyurethane and nanotube chemical characteristics. Moderate improvements of mechanical properties (such as tensile strength and Young's modulus) were systematically attained with contents of a few percent ($2-8 wt%) of nanofiller [2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polyurethane based on hydroxyl terminated polybutadiene and reinforced by carbon nanotubes

Shokry¹,

Morsi

Sabaa

et al. 2015

Egyptian Journal of Petroleum

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Nanocomposites consisting of multi wall carbon wall carbon nano tubes MWCNT/polyurethane (PU) had been successfully prepared based on hydroxy terminated polybutadiene HTPB and the prepared MWCNT. The effect of concentration of prepared MWCNT and surface modified CNT on the morphology, mechanical reinforcement, and thermal properties of PU-based composites had been evaluated by FESEM, tensile testing, thermo gravimetric analysis TGA and differential scanning calorimeter DSC.Polyurethane (PU) networks based on hydroxyl terminated polybutadiene (HTPB) and isophorone diisocyanate (IPDI) compound were prepared by a batch process. Two methods had been used to fabricate PU matrix/carbon nanotube nanocomposites: direct incorporation of unfunctional CNT (UCNT) into polymer matrices (noncovalent attachment) and in situ polymerization at their surface (covalent attachment).TGA showed a much better improvement of thermal stability of the composites than pure PU. Glass temperature (Tg) increased due to high interaction of CNT with PU. Also Young's modulus increased. FESEM gave that the covalent attachment was better than noncovalent attachment for preparing PU/CNT composites. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of Egyptian Petroleum Research Institute. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polyurethane based on hydroxyl terminated polybutadiene and reinforced by carbon nanotubes

Shokry¹,

Morsi

Sabaa

et al. 2015

Egyptian Journal of Petroleum

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“…[7][8][9] Carbonaceous materials have a great potential as filler for polymers because they imparts good thermal stability, conductivity and high strength. In fact, several studies on the influence of adding carbon fibres, [10] carbon nanotubes (CNT), [11,12] activated carbon [13] and carbon black [14] to different polymers have been published. The main aims of adding carbon materials to polymers were the improvement of their electric properties for electric and electronics applications, [14] the impartment of shape memory properties [10,15] and the improvement of the heat insulation properties of polyurethane foams.…”

Section: Introductionmentioning

confidence: 99%

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Álvarez-García

Martı́n-Martı́nez

2015

Journal of Adhesion Science and Technology

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Different mixtures of thermoplastic polyurethane (PU) with different amounts of nanometric carbon black (CB) were prepared by mechanical stirring in organic solvent, and their thermal, rheological, viscoelastic and mechanical properties were investigated. The rheology of the PU-CB mixtures in methyl ethyl ketone was optimized, allowing good dispersion of the CB in the polyurethane matrix once the solvent was removed; an increase in the number and size of carbon black aggregates in the polyurethane matrix was obtained by increasing the carbon black loading. Addition of carbon black improved the rheological and viscoelastic properties of the polyurethane, and the larger was the carbon black content, the higher was the storage modulus and the lower was the tanδ value. Moreover, the addition of higher amounts of CB changed the viscoelastic behaviour of the polyurethane, which became mainly elastic over all temperature range. On the other hand, the addition of CB loadings up to 12 wt% increased the thermal stability of the polyurethanes and increased the elongation-at-break without noticeable reduction in the tensile strength.

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“…Carbon nanotubes have been introduced into many polymer matrices [12][13][14][15][16] . Reported methods to fabricate polyurethane/CNT composites include solution casting [7][8][9]17] , melting processing [18,19] and in situ polymerization [11,20,21] . Several chemical treatments on the surface of CNTs have been shown to enhance interactions between the CNT and the polymeric matrix [15,17,[20][21][22] .…”

Section: Introductionmentioning

confidence: 99%

Electrical conductivity and thermal properties of functionalized carbon nanotubes/polyurethane composites

Lima¹,

Castro²,

Borges³

et al. 2012

Polímeros

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Multi-walled carbon nanotubes (MWCNTs) functionalized with amine and carboxyl groups were used to prepare polyurethane/ MWCNT nanocomposites in two distinct concentrations: a lower value of 1 mass% (spray coating) and a higher one of ~50 mass% (buckypaper based). The MWCNT-NH 2 sample contained only 0.5 mass% of amine groups, whereas MWCNT-COOH contained 5 mass% of carboxyl groups. The MWCNT functionalized with low amine group content showed improved thermal properties when compared to neat thermoplastic polyurethane (TPU) and MWCNT-COOH based nanocomposites. The electrical conductivity of the polyurethane elastomer was greatly increased from 10 -12 to ~10 -5 S cm -1 in the 1 mass% nanotube composite and to 7 S cm -1 for the MWCNT-NH 2 buckypaper-based nanocomposite. Furthermore, the relative high content of functional groups in the MWCNT-COOH sample, which disrupt the sp 2 structure in the nanotube walls, led to inferior properties; for instance the conductivity of the buckypaper based composite is one order of magnitude lower when using MWCNT-COOH in comparison with the MWCNT-NH 2 . These results show the range of property design possibilities available with the elastomeric polyurethane nanocomposite by tailoring the functional group content and the carbon nanotube load.

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Melt mixing of carbon fibers and carbon nanotubes incorporated polyurethanes

Cited by 41 publications

References 31 publications

Synthesis and characterization of polyurethane based on hydroxyl terminated polybutadiene and reinforced by carbon nanotubes

Synthesis and characterization of polyurethane based on hydroxyl terminated polybutadiene and reinforced by carbon nanotubes

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Electrical conductivity and thermal properties of functionalized carbon nanotubes/polyurethane composites

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