Electrical resistivity and thermal properties of compatibilized multi-walled carbon nanotube/polypropylene composites

Szentes, A.; Varga, Cs.; Horváth, Géza; Bartha, L.; Kónya, Zoltán; Haspel, Henrik; Szél, József; Kukovecz, Ákos

doi:10.3144/expresspolymlett.2012.52

Cited by 44 publications

(42 citation statements)

References 28 publications

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“…The addition of single-wall carbon nano-tubes (SWCNTs) into a polymer matrix are found to improve the composite's properties, including mechanical, 1-4 thermal, [5][6][7] electrical, [8][9][10] and barrier properties. 11 The dispersion of the nano-tubes, which is the most important factor in controlling the properties of the nano-composite, 12 depends on their interaction with the polymer in the matrix in the stagnant condition.…”

Section: Introductionmentioning

confidence: 99%

Organization of polymer chains onto long, single-wall carbon nano-tubes: Effect of tube diameter and cooling method

Kumar

Pattanayek

Pereira

2014

The Journal of Chemical Physics

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We use molecular dynamics simulations to investigate the arrangement of polymer chains when absorbed onto a long, single-wall carbon nano-tube (SWCNT). We study the conformation and organization of the polymer chains on the SWCNT and their dependence on the tube's diameter and the rate of cooling. We use two types of cooling processes: direct quenching and gradual cooling. The radial density distribution function and bond orientational order parameter are used to characterize the polymer chain structure near the surface. In the direct cooling process, the beads of the polymer chain organize in lamella-like patterns on the surface of the SWCNT with the long axis of the lamella parallel to the axis of the SWCNT. In a stepwise, gradual cooling process, the polymer beads form a helical pattern on the surface of a relatively thick SWCNT, but form a lamella-like pattern on the surface of a very thin SWCNT. We develop a theoretical (free energy) model to explain this difference in pattern structures for the gradual cooling process and also provide a qualitative explanation for the pattern that forms from the direct cooling process.

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Section: Introductionmentioning

confidence: 99%

Organization of polymer chains onto long, single-wall carbon nano-tubes: Effect of tube diameter and cooling method

Kumar

Pattanayek

Pereira

2014

The Journal of Chemical Physics

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“…Further compatibilization of the polypropylene matrix by grafting it with different agents such as maleic anhydride, methylstyrene 23 and copolymers based on maleic anhydride 24 can lead to nanocomposites with even higher mechanical and thermal properties, due to an increased matrix-filler adhesion.…”

Section: Discussionmentioning

confidence: 99%

Multi-walled carbon nanotubes effect in polypropylene nanocomposites

Ban¹,

Stefan²,

Dinca³

et al. 2016

Mater. Tehnol.

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The paper presents a study concerning thermoplastic nanocomposites having polypropylene as the matrix and different contents of carboxyl-functionalized multi-walled carbon nanotubes as the nanofiller. The materials are obtained by melt compounding the nanofiller powder and polymer pellets through the extrusion process followed by injection molding into specific-shape specimens. The materials are evaluated in terms of mechanical properties such as the tensile and flexural strengths and moduli, the thermal stability under load (the heat deflection temperature) and the thermal-behavior properties using a TG-DSC analysis. The fracture cross-section is analyzed using FTIR spectroscopy and SEM microscopy to evaluate the bulk characteristics of the materials. The results show positive effects of the nanofiller addition to the thermoplastic polymer on the mechanical strength and modulus of the materials during flexural and tensile tests, while in the case of the thermal stability under load, the nanofiller addition has a minor influence on the heat-deflection-temperature values. Keywords: polypropylene, melt mixing, carbon nanotubes, mechanical properties, thermal resistancê lanek predstavlja {tudijo termoplasti~nih nanokompozitov s polipropilensko osnovo in razli~no vsebnostjo s karboksilom obdelanih, ve~stenskih ogljikovih nanocevk kot nanopolnilom. Materiali so bili dobljeni iz taline, sestavljene iz prahu nanopolnila in peletov polimerov, s postopkom ekstruzije, ki mu je sledilo tla~no litje vzorcev. Materiali so ocenjeni glede mehanskih lastnosti, kot so natezna in upogibna trdnost in moduli, toplotne stabilnosti pri obremenitvi (deformacijska toplota) in toplotne zna~ilnosti z uporabo TG-DSC analize. Za oceno zna~ilnosti osnovnega materiala je bil analiziran prelom s pomo~jo FTIR spektroskopije in SEM mikroskopije. Rezultati ka`ejo pozitivne u~inke vpliva dodatka nanopolnila termoplasti~nemu polimeru na mehansko trdnost in module materiala pri upogibnem in nateznem preizkusu, medtem ko ima dodatek nanopolnila manj{i vpliv na vrednosti deformacijske toplote pri obremenitvi.

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“…One method used to increase the electrical conductivity of polymers is the addition of conductive fillers, such as graphite, carbon black (CB), carbon nanotubes or graphene [3][4][5][6]. The most commonly used processes to disperse these fillers into polymer matrices are solution and melt mixing.…”

Section: Introductionmentioning

confidence: 99%

Effect of processing technology on the morphological, mechanical and electrical properties of conductive polymer composites

Király

Ronkay

2013

Journal of Polymer Engineering

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Conducting carbon/polypropylene (PP) and carbon/poly(butylene terephthalate) (PBT) composites containing crystalline natural graphite and carbon black (CB) were prepared by compression and injection molding. The effect of the processing technology on the electrical, mechanical, and morphological properties was investigated. Determination of the constant torque at the end of the mixing process and differential scanning calorimetric (DSC) measurements showed that graphite had better connectivity with the more polar matrix (PBT) than with the less polar one (PP). Scanning electron microscopy (SEM) studies showed that compression molding results in a homogeneous structure, while injection molding results in a skin-core structure with different orientations. Layered electrical conductivity studies showed that the electrical conductivity of the compression molded samples did not change along the thickness of the sample, while that of the injection molded samples changed throughout the material, which is due to the different structures developed with each type of processing.

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Electrical resistivity and thermal properties of compatibilized multi-walled carbon nanotube/polypropylene composites

Cited by 44 publications

References 28 publications

Organization of polymer chains onto long, single-wall carbon nano-tubes: Effect of tube diameter and cooling method

Organization of polymer chains onto long, single-wall carbon nano-tubes: Effect of tube diameter and cooling method

Multi-walled carbon nanotubes effect in polypropylene nanocomposites

Effect of processing technology on the morphological, mechanical and electrical properties of conductive polymer composites

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