Structure-reinforcement correlation and chain dynamics in graphene oxide and Laponite-filled epoxy nanocomposites

Chouhan, Devesh Kumar; Rath, Sangram K.; Kumar, Arvind; Alegaonkar, P.S.; Kumar, Sanjay; Harikrishnan, G.; Patro, T. Umasankar

doi:10.1007/s10853-015-9305-5

Cited by 23 publications

(12 citation statements)

References 60 publications

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“…An improvement in flexural modulus is commonly expected for composite materials, since the inorganic (nano)particles usually exhibit values of elastic modulus higher than those of the polymers. When compared to a thermoplastic or elastomer, it is more difficult to obtain significant improvements on mechanical properties for crosslinked thermosetting materials, such as epoxy . However, the results obtained show only a neutral or negative influence of the three fillers in the properties of the matrix.…”

Section: Resultsmentioning

confidence: 65%

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

Ceretti

Silva

Gonçalves

et al. 2019

Macromolecular Symposia

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Epoxy composites containing montmorillonite (MMT), laponite (LAP), and halloysite nanotubes (HNT) are prepared using two different dispersion techniques: sonication and high energy ball milling. The mechanical properties of the composite materials are monitored as a function of the type of clay particle/geometry and processing technique. The materials are characterized by X‐ray diffraction, microscopy techniques, parallel plate rheometry, and mechanical testing. Experimental results present clear evidence that sonication has led to better nanoparticle dispersion. The results also indicate that the composites manufactured via sonication exhibited higher ductility.

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Section: Resultsmentioning

confidence: 65%

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

Ceretti

Silva

Gonçalves

et al. 2019

Macromolecular Symposia

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“…In general, the thermophysical properties of polymer‐based composites are microstructure dependent, that is, dispersion of filler and interaction between filler and matrix . Figure shows the morphology of the PEG and the composites.…”

Section: Resultsmentioning

confidence: 99%

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Fauziyah

Hilmi

Fadly

et al. 2018

J of Applied Polymer Sci

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The effect of silica polymorphs on the thermomechanical properties of 0, 5, 10, and 20 wt % silica particles-reinforced-based poly(ethylene glycol) (PEG) composites have been studied as a function of temperature using dynamic mechanical analysis (DMA). The silica polymorphs exhibited quartz (Q), cristobalite (C), and amorphous (A) phases, which were obtained by processing natural silica sand. The DMA thermomechanical properties were determined in tensile (E) and shear (G) modes. The maximum storage moduli (E 0 and G 0 ) were achieved by samples with 20 wt % silica for all type of fillers. These values increased approximately 12 times for PEG/Q, 10 times for PEG/A, and 11 times for PEG/C composites compared to the pure PEG. Furthermore, the Poisson's ratio values of the composites were filler phase dependent, that is, 0.39-0.47 for PEG/Q, 0.15-0.18 for PEG/A, and somewhat anomalous for PEG/C composites.

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“…Such a three-dimensional network structure is favourable for increasing the viscosity of polymer upon exposure to heat source. It also can change the rheological behaviour of polymer and prevent its dripping, thereby hindering the release and diffusion of volatile decomposition products through the ''labyrinth effect'' and affecting the flame retardancy of composites (e.g., changing UL-94 classification, oxygen index (OI) and time to ignition (TTI)) [33][34][35][36][37][38].…”

Section: Graphene and Graphene Oxide Flame Retardantsmentioning

confidence: 99%

Graphene-based flame retardants: a review

Sang

et al. 2016

J Mater Sci

184

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Graphene and its derivatives are potential flame retardant materials with good flame retardant performance; in particular, graphene as an adjuvant in combination with inorganic nanomaterials may be a promising candidate of flame retardant. This review describes the flame retardant mechanism, the development trend, and the classification of graphene-based flame retardants. It points out that graphene has attracted intensive interests in the fields of electronics, energy, and information, due to its excellent properties such as high thermal conductivity, good electron transport ability, and large specific surface area. In the meantime, graphene can change the pyrolysis as well as the thermal conductivity, heat absorption, viscosity and dripping of polymer during the combustion process. In other words, graphene can improve the thermal stability of polymer and delay its ignition, and it can also inhibit fire from spreading and reduce heat release rate.

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Structure-reinforcement correlation and chain dynamics in graphene oxide and Laponite-filled epoxy nanocomposites

Cited by 23 publications

References 60 publications

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

The Role of Dispersion Technique and Type of Clay on the Mechanical Properties of Clay/Epoxy Composites

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Graphene-based flame retardants: a review

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