Morphology, thermal, and mechanical properties of polypropylene/polyaniline coated short glass fiber composites

Cruz-Silva, Rodolfo; Romero‐García, Jorge; Vázquez‐Rodríguez, Sofia; Angulo-Sánchez, J.L.

doi:10.1002/app.26026

Cited by 16 publications

(25 citation statements)

References 42 publications

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“…However, in our study, Fe-CNT grown PPy-coated WKF/PES composites displayed a relatively low increase in electrical conductivity due to the presence of PES resin in the composites. Similar findings were also reported for polyaniline-coated glass fibre/isotactic polypropylene/maleic anhydride grafted polypropylene composites44. The synergistic effect of Ag nanoparticle-decorated multilayered graphene nanosheets and Fe-CNTs in Ag-graphene/Fe-CNT/PPy-coated WKF/PES composites further improved their electrical conductivity.…”

Section: Resultssupporting

confidence: 85%

Microwave-synthesized freestanding iron-carbon nanotubes on polyester composites of woven Kevlar fibre and silver nanoparticle-decorated graphene

Hazarika

Deka

Kim

et al. 2017

Sci Rep

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We synthesized Ag nanoparticle-decorated multilayered graphene nanosheets (Ag-graphene) from graphite nanoplatelets and silver nitrate through 90–100 s of microwave exposure, without the use of any mineral acids or harsh reducing agents. Fe nanoparticle-decorated carbon nanotubes (Fe-CNTs) were grown on polypyrrole (PPy) deposited on woven Kevlar fibre (WKF), using ferrocene as a catalyst, under microwave irradiation. Fe-CNTs grown on WKF and Ag-graphene dispersed in polyester resin (PES) were combined to fabricate Ag-graphene/Fe-CNT/PPy-coated WKF/PES composites by vacuum-assisted resin transfer moulding. The combined effect of Fe-CNTs and Ag-graphene in the resulting composites resulted in a remarkable enhancement of tensile properties (a 192.56% increase in strength and 100.64% increase in modulus) as well as impact resistance (a 116.33% increase). The electrical conductivity significantly increased for Ag-graphene/Fe-CNT/PPy-coated WKF/PES composites. The effectiveness of electromagnetic interference shielding, which relies strongly on the Ag-graphene content in the composites, was 25 times higher in Ag-graphene/Fe-CNT/PPy-coated WKF/PES than in neat WKF/PES composites. The current work offers a novel route for fabricating highly promising, cost effective WKF/PES composites through microwave-assisted synthesis of Fe-CNTs and Ag-graphene.

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Section: Resultssupporting

confidence: 85%

Microwave-synthesized freestanding iron-carbon nanotubes on polyester composites of woven Kevlar fibre and silver nanoparticle-decorated graphene

Hazarika

Deka

Kim

et al. 2017

Sci Rep

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“…Applications in the aerospace, military, and automotive industries have resulted in the development of new reinforced‐polymer composites with new properties. In this study, we used a novel electrically conductive reinforced composite, isotactic polypropylene (iPP) reinforced with short glass fibers (SGF) which are coated with polyaniline (PAn) [15, 16]. Polyaniline, an intrinsically conductive polymer, has been increasingly used in the preparation of thermoplastics‐based composites for electromagnetic shielding or antistatic applications [17–23].…”

Section: Introductionmentioning

confidence: 99%

“…However, the addition of PAn to polymer matrices usually results in a loss or degradation of mechanical properties, compromising the performance of these composites. To combine the electrical conductivity of PAn and the reinforcing properties of glass fibers, synthetic routes have been developed where SGFs are coated with PAn [16, 25]. The PAn‐coated SGF (PAn‐SGF) are then easily added to a polymer matrix by, say, extrusion processing.…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, Cruz‐Silva et al [15, 16] have reported on a novel reactor design for the massive synthesis of Polyaniline‐ grafted ‐short glass fibers (PAn‐ g ‐SGF). The PAn‐ g ‐SGFs thus produced were added to iPP by melt compounding and results demonstrated electrical conductivity in these composites.…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the electrical properties, the composites of iPP with Pan‐ g ‐SGF increments its electrical conductivity σ by three orders of magnitude because the amount of fibers was increased from 20 to 30 wt% and the electrical conductivity values changed from ∼10 −12 to 10 −9 S/cm [16]. The results showed that there is a percolation threshold above 20 wt% PAn‐ g ‐SGFs, producing an anisotropic electrically conductive composite.…”

Section: Introductionmentioning

confidence: 99%

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Electrically conducting polypropylene/polyaniline‐grafted‐short glass fiber composites: Microstructure and dynamic mechanical analysis

Valerio-Cárdenas¹,

Romo-Uribe²,

Cruz-Silva³

2010

Polymer Engineering & Sci

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The thermal properties of isotactic polypropylene (iPP) reinforced with polyaniline‐grafted‐short glass fibers (PAn‐g‐SGF) at 10, 20, and 30 wt% concentration and iPP blended with 5 wt% PP‐grafted‐maleic anhydride (PP‐gMA) and 30 wt% of PAn‐g‐SGF were investigated. iPP crystallizes into a spherulitic morphology, the microfiller promoted larger spherulite size and higher dynamic modulus, but the overall degree of crystallinity decreased as the concentration of PAn‐g‐SGF increased. The melting temperature, Tm, was not influenced by the microfiller. However, the crystallization temperature, Tc, as determined by DMA, first decreased reaching a minimum at ca. 20 wt%, and then increased, in contrast with Tc determined by DSC, it increased as concentration increased. The initial reduction in Tc observed by DMA seems to be associated with the crystallites growing from the microfiller into the matrix, the overall molecular dynamics then being less affected. On the other hand, increase in Tc above 20 wt% concentration suggests that the percolation threshold could be responsible for these results. Addition of the maleic anhydride copolymer produced higher shear modulus, transition temperatures, and activation energy, suggesting higher interaction between microfiller and polymer matrix. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers

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Melt rheology of polypropylene reinforced with polyaniline‐coated short glass fibers

Romero-Guzmán

Romo-Uribe

Cruz-Silva

2008

J of Applied Polymer Sci

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This research deals with the melt rheology of isotactic polypropylene (iPP) reinforced with short glass fibers (SGF) coated with electrically conductive polyaniline (PAn). Composites containing 10, 20, and 30 wt % PAn-SGF were studied. Moreover, a composite of 30 wt % PAn-SGF was also prepared with a blend of iPP and PP-grafted-maleic anhydride (iPP/PP-gMA). The composites showed linear viscoelastic regime at small strain amplitudes. The onset of nonlinearity decreased as the concentration of filler increased. The time-temperature superposition principle applied to all composites. The filler increased the shear moduli (G 0 , G 00 ) and the complex viscosity h*. Steady-state shear experiments showed yield stress for the composites with 20 and 30 wt % PAn-SGF. Strikingly, the 10 wt % composite showed higher steady state viscosity than the 20 wt %. Rheo-optics showed that shear induced disorder of micro-fibers at a concentration of 10 wt %. However, at 20 wt % concentration shear aligned the microfibers along the flow axis, this would explain the anomalous steady state viscosity values. The viscosity exhibited a shear thinning behavior at high shear rates for all composites. Creep experiments showed that the filler induced greater strain recovery in the composites and that the amount of strain recovery increased as the PAn-SGF concentration increased. However, the enhancement of strain recovery (as well as shear viscosity) was more significant when using the iPP/PP-gMA blend, suggesting greater adhesion between this matrix and the filler PAn-SGF.

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Morphology, thermal, and mechanical properties of polypropylene/polyaniline coated short glass fiber composites

Cited by 16 publications

References 42 publications

Microwave-synthesized freestanding iron-carbon nanotubes on polyester composites of woven Kevlar fibre and silver nanoparticle-decorated graphene

Microwave-synthesized freestanding iron-carbon nanotubes on polyester composites of woven Kevlar fibre and silver nanoparticle-decorated graphene

Electrically conducting polypropylene/polyaniline‐grafted‐short glass fiber composites: Microstructure and dynamic mechanical analysis

Melt rheology of polypropylene reinforced with polyaniline‐coated short glass fibers

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