Structure and electrical properties of grafted polypropylene/graphite nanocomposites prepared by solution intercalation

Shen, Jingwei; Chen, Xiaomei; Huang, Wenyi

doi:10.1002/app.11892

Cited by 120 publications

(65 citation statements)

References 15 publications

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“…The same pattern can be seen for the hybrid formulations where for example the solution-mixed 80-20 hybrid at 10 wt% (4.7 vol%) had similar conductivity level as the 7.7 vol% melt mixed composition. Based on these results, the solution-mixing process was more efficient in terms of filler dispersion in comparison with the melt-mixing one for this specific combination of polymer and filler, something that has been seen in earlier works of many authors [26,[28][29][30]. In the work by Oxfall et al, [28] GNP was mixed with polystyrene (PS), and it was observed that relatively large agglomerates were present in the composite after the melt mixing process.…”

Section: Electrical Conductivitysupporting

confidence: 55%

Effect of carbon black on electrical and rheological properties of graphite nanoplatelets/poly(ethylene-butyl acrylate) composites

Oxfall¹,

Ariu²,

Gkourmpis³

et al. 2015

Express Polym. Lett.

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Abstract. The effect of adding carbon black on the electrical and rheological properties of graphite nanoplatelets/poly(ethylene-butyl acrylate) copolymer composites produced via melt or solution mixing was studied. By adding a small amount of low-or high-structured carbon black to the nanocomposite, the electrical percolation threshold decreased and the final conductivity (at higher filler contents) increased. The effect on the percolation threshold was significantly stronger in case of the high-structured carbon black where replacing 10 wt% of the total filler content with carbon black instead of graphite nanoplatelets reduced the electrical percolation threshold from 6.9 to 4.6 vol%. Finally, the solution mixing process was found to be more efficient leading to a lower percolation threshold. For the composites containing high-structured carbon black, graphite nanoplatelets and their hybrids there was a quite reasonable correlation between the electrical and rheological percolation thresholds.

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Section: Electrical Conductivitysupporting

confidence: 55%

Effect of carbon black on electrical and rheological properties of graphite nanoplatelets/poly(ethylene-butyl acrylate) composites

Oxfall¹,

Ariu²,

Gkourmpis³

et al. 2015

Express Polym. Lett.

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“…Also, CB can be spread in a layer of nanometer scale thickness. Recently, there has been increased interest in composites of CB and polymers [3][4][5]. However, processing of CB has been limited by its poor solubility or dispersibility in most common solvents due to the strong Van der Waals attraction [6].…”

Section: Introductionmentioning

confidence: 99%

Polystyrene grafted carbon black synthesis via in situ solution radical polymerization in ionic liquid

Qiu

Liu

et al. 2013

J Polym Res

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DENKA BLACK/polystyrene nanocomposites (DB/PS) were successfully prepared through a facile strategy. Some of the styrene molecules were grafted and polymerized onto the surface of the DB via the in situ free radical addition process in ionic liquid, and others selfpolymerized and coated on the polystyrene grafted DB. The ionic liquid improves the grafting percentage because of its high viscosity. The electrical properties of polymer composites before and after the grafting were measured. It was found that the electrical conductivity of the DB/PS composites decreased with increasing amounts of monomer styrene and initiator 2, 2′-azobis (isobutyronitrile) (AIBN). The microstructure, morphology and thermal properties of the composites were characterized by Fourier transforminfrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. The results proved that the polystyrene had been successfully grafted onto the DB surface.

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“…It will be shown that the combination of low molecular weight PPgMA with ODA greatly improve the dispersion and the properties of the PPgMA/GO nanocomposites. In view of the success of the layered nanocomposites of POP-diamine and PPgMA modified clay [30,43] or graphite [44,45], we attempted in this study to prepare the conducting polypropylene nanocomposites of ODA intercalated graphite oxide in combination with the two different types of oligomers via solution blending. The goal of this research is to explore the effect of surfactant molecular weight on the thermal, mechanical, and conductive properties, of the nanocomposites.…”

mentioning

confidence: 99%

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

Wang

Jc²,

Sz³

2014

Express Polym. Lett.

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Conductive polymer composites have aroused wide interests from both academia and industry in the field of functional materials. Addition of diverse conducting fillers such as carbon black [1,2], graphite [3], and metal fiber or powder [4] into thermoplastic polymers through melt mixing is an effective approach to fabricate conductive composites. Because a great amount of the fillers, generally greater than 15 wt% [5], were required for the host polymer to become conductive, resulting in both poor processability and inferior mechanical properties, the practical applications of these conventional composites were largely restricted. On the other hand, commercial exploitation of isotactic polypropylene has been expanded rapidly due to its attractive characters of low cost, low weight, heat distortion above 100°C, and extraordinary versatility in terms of properties, applications and recycling. The introduction of nanoscopic fillers of high anisotropy enhances a wide range of performance of the polypropylene nanocomposites, such as mechanical, thermal and conductive properties, at a relatively small loading [6]. Graphite is a layered mineral composed of weakly bonded graphene sheets with a large aspect ratio. Abstract. Various surfactants of different molecular weights, including alkylamine, poly(oxypropylene) diamine (POP), and maleic anhydride grafted polypropylene (PPgMA) oligomers, were used for simultaneous funtionalization and reduction of graphite oxide (fGO). In this study, the effect of molecular weight and compatibility of the surfactants on the morphology and properties of the nanocomposites are reported. Wide-angle X-ray diffraction (WAXD) exhibited a definite interlayer thickness for GOA (alkylamine intercalated GO), however, the diffraction peaks were nearly suppressed for fGOs combining ODA with either POP (GOAP) or PPgMA (GOAE). The uniform dispersion of the fGO flakes in the polypropylene matrix resulted in the significant increase in both the degradation temperature and the crystallization temperature. A single characteristic melting peak of monoclinic (!) crystalline phase was observed from DSC traces, which was consistent with WAXD results. Dynamic mechanical analysis clearly indicated increase in both the storage modulus and the glass transition temperature of the nanocomposites due to the enhanced affinity between fGO and the polypropylene matrix. However, GOAP composite showed lower E" and T g than GOAE because POP is less compatible with the matrix than PPgMA oligomer. Dielectric analysis also showed significant increase in both dielectric permittivity and dielectric loss at low frequency regimes with GOAE showing maximum dielectric properties. The finely dispersed GOAE and its compatibility with polymer matrix manifested the interfacial polarization, which gave rise to much greater #" and #$ than other nanocomposites.

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Structure and electrical properties of grafted polypropylene/graphite nanocomposites prepared by solution intercalation

Cited by 120 publications

References 15 publications

Effect of carbon black on electrical and rheological properties of graphite nanoplatelets/poly(ethylene-butyl acrylate) composites

Effect of carbon black on electrical and rheological properties of graphite nanoplatelets/poly(ethylene-butyl acrylate) composites

Polystyrene grafted carbon black synthesis via in situ solution radical polymerization in ionic liquid

Role of surfactant molecular weight on morphology and properties of functionalized graphite oxide filled polypropylene nanocomposites

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