Electrical and mechanical properties of PMMA/reduced graphene oxide nanocomposites prepared via in situ polymerization

Tripathi, Sandeep Nath; Saini, Parveen; Gupta, Deeksha; Choudhary, Veena

doi:10.1007/s10853-013-7420-8

Cited by 173 publications

(126 citation statements)

References 37 publications

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“…[31] The prepolymer syrup was prepared by bulk polymerization of MMA in the absence or presence of varying amounts of RGO (i.e. from 0 to 5 wt%) initiated by 1.0 wt% azobisisobutyronitrile (Fig.…”

Section: Preparation Of Pmma-rgo Nanocomposites Sheetmentioning

confidence: 99%

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Melt rheology and thermomechanical behavior of poly(methyl methacrylate)/reduced graphene oxide nanocomposites

Tripathi

Malik

Choudhary

2015

Polymers for Advanced Techs

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Thermomechanical and rheological behavior of poly(methyl methacrylate) (PMMA)/reduced graphene oxide (RGO) nanocomposites prepared via in situ polymerization using sheet casting method was investigated. Scanning electron microscope and transmission electron microscope were used to study the microstructure of nanocomposites in terms of dispersion of RGO and polymer-RGO interaction. The thermomechanical properties were investigated using dynamic mechanical analyzer, and it was found that the incorporation of RGO sheets into PMMA matrix resulted in an increase in both storage modulus and glass transition temperature (T g ) as compared with neat PMMA. Storage modulus showed an increase of 40% and 46% at a loading of 0.5 and 1.0 wt% RGO, respectively. The glass transition temperature showed an increase of 20°C (104°C for neat PMMA) at RGO loading of 2.0 wt% (124°C for sample PMMA-2.0). The complex viscosity and moduli (storage and loss) as a function of angular frequency also showed an increase with increasing amount of RGO. A significant increase in melt viscosity of PMMA observed in case of sample having 0.5 wt% RGO (sample PMMA-0.5) could be due to the formation of interconnected network of RGO in PMMA matrix and can be considered as rheological percolation threshold. A drop in the crossover frequency was registered with increase of RGO loading that does not directly correlate with the percolation threshold concentration, representing an increase in solid-like behavior. Secondly, the complex viscosity did not change with RGO loading at higher frequency, which showed that the short-range PMMA relaxations were unaffected by RGO.

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Section: Preparation Of Pmma-rgo Nanocomposites Sheetmentioning

confidence: 99%

“…The detail method for preparation and characterization of grapheme has been reported in our previous paper. [31] The surface characteristics and morphological characterization of RGO were performed using SEM, TEM, and AFM. Figure 2 show the SEM, TEM, and AFM images of reduced graphene oxide platelets.…”

Section: Characterization Of Reduced Graphene Oxidementioning

confidence: 99%

Melt rheology and thermomechanical behavior of poly(methyl methacrylate)/reduced graphene oxide nanocomposites

Tripathi

Malik

Choudhary

2015

Polymers for Advanced Techs

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“…Specifically, few-layered graphene (FLG) may increase the reflection contribution by enlarging the in-plane effective reflection regions of graphene. Additionally, Tripathi et al [84] reported that the PMMA/graphene nanocomposite with better orientation of graphene shows a higher electrical conductivity.…”

Section: Aspect Ratio and Orientation Of Graphenementioning

confidence: 99%

Graphene Nanocomposites for Electromagnetic Induction Shielding

Zhai

2015

Graphene-Based Polymer Nanocomposites in Electronics

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The unique properties of graphene, such as high specific surface area, aspect ratio and electrical conductivity, make it very promising to fabricate electromagnetic induction (EMI) shielding materials. In this chapter, we first made a brief introduction about the development of EMI shielding materials as well as the preparation of graphene and polymer/graphene nanocomposites (PGNs). Typical surface modification of graphene to optimize its dispersion within polymer matrix was reviewed later. After that, we presented critical factors for the EMI shielding effectiveness (SE) of PGNs in detail. Meanwhile, the EMI shielding mechanism was introduced associated with corresponding examples.

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“…One is Hummer's method or its derivatives [14,[19][20][21][22], that is to use acids to fully exfoliate graphite into single layer graphene oxide (GO) sheets, and GO sheets could be further reduced to graphene sheets by different methods, such as laser scribe, hydrogen reduction, thermal reduction, etc. This route has been used by several researchers to make graphene polymer nanocomposites [14,23,24]. However, GO itself is an insulator, and reduced GO graphene sheets always have defects, and during the process it could produce toxic wastes.…”

Section: Introductionmentioning

confidence: 99%

Comparison study of graphene based conductive nanocomposites using poly(methyl methacrylate) and polypyrrole as matrix materials

Wang

Jayatissa

2015

J Mater Sci: Mater Electron

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Graphene was used as the filler to mix with two kinds of polymer materials, poly(methyl methacrylate) (PMMA) and polypyrrole (PPy). PMMA is an insulator and PPy is an intrinsic semiconducting/conducting polymer. Graphene/PMMA nanocomposite (GrPMMA) was produced by solution blending and spin-coating deposition, and graphene/PPy nanocomposite (GrPPy) was produced by in situ polymerization and doctor-blade coating. The X-ray diffraction and Raman spectroscopy were used to characterize the structures of GrPMMA and GrPPy. The electrical conductivity was studied as a function of graphene concentration for both GrPMMA and GrPPy. The electrical conductivity of PMMA was improved drastically after adding graphene, and the electrical conductivity of GrPMMA increases as the graphene concentration increases. However, the electrical conductivity of PPy decreases after adding graphene, and the electrical conductivity of GrPPy decreases as the graphene concentration increases. The difference in change in electrical conductivity of PMMA and PPy after addition of graphene may be due to the different electron transport mechanisms of those two nanocomposite materials.

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Electrical and mechanical properties of PMMA/reduced graphene oxide nanocomposites prepared via in situ polymerization

Cited by 173 publications

References 37 publications

Melt rheology and thermomechanical behavior of poly(methyl methacrylate)/reduced graphene oxide nanocomposites

Melt rheology and thermomechanical behavior of poly(methyl methacrylate)/reduced graphene oxide nanocomposites

Graphene Nanocomposites for Electromagnetic Induction Shielding

Comparison study of graphene based conductive nanocomposites using poly(methyl methacrylate) and polypyrrole as matrix materials

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