In situ polymerized poly(propylene)/graphene nanoplatelets nanocomposites: Dielectric and microwave properties

Шевченко, В. Г.; Polschikov, Sergey V.; Недорезова, П. М.; Klyamkina, A. N.; Щеголихин, А. Н.; Aladyshev, A. M.; Muradyan, V. E.

doi:10.1016/j.polymer.2012.09.018

Cited by 37 publications

(20 citation statements)

References 28 publications

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“…In this method, polyolefin/graphene nanocomposites are prepared by using the propylene or ethylene monomer and different types of catalysis such as metallocene complex rac-Me 2 Si (Ind) 2ZrCl 2 catalyst and methyl aluminoxane as cocatalyst [90,91], Ziegler-Natta catalyst [92], and Ni(II) catalyst precursor [93]. This technique results in a stronger interfacial interaction and better miscibility of graphene layer within the polyolefin matrix.…”

Section: In Situ Methods For the Preparation Of Polyolefin/graphene Namentioning

confidence: 99%

“…It was concluded that the low concentration of graphene in PP nanocomposites can enable the composites to behave as a high dielectric material. Shevchenko et al prepared iPP-graphene nanocomposites using liquid propylene, GNPs, and metallocene catalyst through ultrasonication followed by in situ polymerization techniques [91]. The authors suggested that the ultrasonication reduces the aspect ratio of GNP and provides a more uniform distribution of GNP in PP matrix.…”

Section: Electrical Properties Of Polyolefin/graphene Compositesmentioning

confidence: 99%

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Polyolefin/Graphene Nanocomposite Materials

Vengatesan¹,

Mittal²

2015

Handbook of Nanoceramic and Nanocomposite Coatings and Materials

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Section: In Situ Methods For the Preparation Of Polyolefin/graphene Namentioning

confidence: 99%

Section: Electrical Properties Of Polyolefin/graphene Compositesmentioning

confidence: 99%

Polyolefin/Graphene Nanocomposite Materials

Vengatesan¹,

Mittal²

2015

Handbook of Nanoceramic and Nanocomposite Coatings and Materials

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“…Polyolefin-GNP nanocomposites have recently been prepared via in-situ polymerization, and demonstrated modest increases in linear mechanical properties [19][20][21]23,29]. However, the non-linear mechanical properties of the PNCs in these studies were limited by their relatively low molecular weight (M w < 80,000 g/mol).…”

Section: Introductionmentioning

confidence: 99%

“…Through rational metallocene catalyst design, features of the polyolefin microstructure can be controlled, such as molecular weight, co-monomer incorporation, regio-selectivity, and stereo-selectivity [25,26]. In principle, any single site catalyst or combination of catalysts can be applied to an in-situ polymerization, enabling control of the morphology and properties of synthesized PNCs [27,28].Polyolefin-GNP nanocomposites have recently been prepared via in-situ polymerization, and demonstrated modest increases in linear mechanical properties [19][20][21]23,29]. However, the non-linear mechanical properties of the PNCs in these studies were limited by their relatively low molecular weight (M w < 80,000 g/mol).…”

mentioning

confidence: 99%

In-situ polymerization of isotactic polypropylene-nanographite nanocomposites

Cromer

Scheel

Luinstra

et al. 2015

Polymer

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Isotactic Polypropylene-Exfoliated Graphene Nanoplatelet (iPP-xGnP TM ) nanocomposites were prepared through an in-situ polymerization technique and compared to analogous composites prepared by melt compounding. In-situ preparation of iPP-xGnP nanocomposites was accomplished via single site metallocene polymerization of propylene within a toluene dispersion of xGnP nanoparticles. The in-situ prepared nanocomposites were compared to analogous nanocomposites prepared by melt compounding of commercial Ziegler-Natta iPP with xGnP. Optical microscopy showed the in-situ prepared nanocomposites demonstrated poorer xGnP dispersion compared to composites prepared by melt compounding. All xGnP-reinforced nanocomposites demonstrated increased crystallization temperature, as well as increases in mechanical strength and modulus, relative to neat iPP. However, the non-linear mechanical properties were found to be influenced by the both the preparation method and nanoparticle loading. Nanocomposites prepared by in-situ polymerization generally demonstrated superior ductility and fracture toughness compared to composites prepared by melt compounding. The results are discussed with regard to the preparation technique and xGnP loading. IntroductionPolyolefin nanocomposites offer opportunities to improve the properties of polyolefins with relatively small amounts of reinforcement. Compared to traditional fiber-reinforced composites, nanocomposites only require small reinforcement concentrations (< 2 vol %) to create property improvements. Polyolefin nanocomposites have shown property improvements such as M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 mechanical reinforcement, controlled gas permeability, and increased electrical conductivity when compared to the neat polyolefin resins [1].Many researchers strive to improve the mechanical properties of polyolefins using nanoscale reinforcement in order to create new and economical materials. For example, interest in the automotive industry has been directed toward developing reinforced polyolefins to replace engineering thermoplastic and metallic automotive materials, enabling cost and weight savings [2]. Polyolefin nanocomposites are ideal materials for this application due to the availability of low cost nanoscale reinforcements and polyolefin resins.Recently, graphene nanoplatelets (GNPs) have been investigated as nanoreinforcements for polyolefins [3,4]. The production of GNPs can be achieved by the thermal exfoliation of mineral graphite. Most notably, Drzal et al. developed an efficient method to produce Exfoliated Graphene Nanoplatelets (xGnP TM ) using acid intercalation followed by microwave assisted exfoliation [5,6]. These nanoplatelets are ideal nanoscale reinforcements due to their high aspect ratio, surface area, stiffness, thermal conductivity, and nucleation efficiency for crystallization of polyolefins [3,4,7,8]. Typically, polyolefin-GNP nanocomposites demonstrate improved modulus, strength, and higher crystallization temperature, along with decreased st...

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“…The increased interest in the composite materials on the basis of the nanodimensional fillers occurs at present [2,3]. One of the special features of such materials, which possess anisotropy sometimes, is reduction in the percolation threshold, which makes it possible to reach the appropriate level of conductivity of the composite with smaller filling [4].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites for antenna-feeder systems

Bibikov

Kulikovskij

Sharafiev

et al. 2013

2013 IX Internatioal Conference on Antenna Theory and Techniques

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The paper presents results of study of frequency dependence of permittivity and permeability of composite materials based on various polymer matrices and fillers in the form of nanoscale powders -nanoparticles of Si, carbon nanotubes, and magnetite nanoparticles. It is shown that, using the nanodisperse electrically conducting fillers, it is possible to obtain materials with the required dielectric permittivity, and in the case of magnetic nanoparticles to obtain materials with the appropriate magnetic properties.The results may be useful in the development of antenna-feeder systems that include elements that focus or absorb microwave radiation.

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In situ polymerized poly(propylene)/graphene nanoplatelets nanocomposites: Dielectric and microwave properties

Cited by 37 publications

References 28 publications

Polyolefin/Graphene Nanocomposite Materials

Polyolefin/Graphene Nanocomposite Materials

In-situ polymerization of isotactic polypropylene-nanographite nanocomposites

Nanocomposites for antenna-feeder systems

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