Effect of graphene on thermal stability and mechanical properties of ethylene-vinyl acetate: a molecular dynamics simulation

Shi, Jingli; Yang, Junsheng; Zhou, Jingjing; Ji, Hongfei; Tang, Xin; Gao, Tao

doi:10.1088/2053-1591/ab79cd

Cited by 19 publications

(11 citation statements)

References 71 publications

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“…The glass transition temperature only for the masterbatch is slightly shifted towards higher temperatures (up to 103.3 • C). The increase in the glass transition temperature shows a decrease in molecular mobility due to filler-matrix inter- [50,51], which confirms the results obtained from MFR measurements. In order to show the impact of the orientation occurring during the formation of the filaments, all the samples were melted.…”

Section: Thermal Analysissupporting

confidence: 88%

High-Impact Polystyrene Reinforced with Reduced Graphene Oxide as a Filament for Fused Filament Fabrication 3D Printing

et al. 2021

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Graphene and its derivatives, such as graphene oxide (GO) or reduced graphene oxide (rGO), due to their properties, have been enjoying great interest for over two decades, particularly in the context of additive manufacturing (AM) applications in recent years. High-impact polystyrene (HIPS) is a polymer used in 3D printing technology due to its high dimensional stability, low cost, and ease of processing. However, the ongoing development of AM creates the need to produce modern feedstock materials with better properties and functionality. This can be achieved by introducing reduced graphene oxide into the polymer matrix. In this study, printable composite filaments were prepared and characterized in terms of morphology and thermal and mechanical properties. Among the obtained HIPS/rGO composites, the filament containing 0.5 wt% of reduced graphene oxide had the best mechanical properties. Its tensile strength increased from 19.84 to 22.45 MPa, for pure HIPS and HIPS-0.5, respectively. Furthermore, when using the HIPS-0.5 filament in the printing process, no clogging of the nozzle was observed, which may indicate good dispersion of the rGO in the polymer matrix.

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Section: Thermal Analysissupporting

confidence: 88%

High-Impact Polystyrene Reinforced with Reduced Graphene Oxide as a Filament for Fused Filament Fabrication 3D Printing

et al. 2021

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“…This can be attributed to the strong interfacial energy between graphene oxide and EVA matrix due to higher polarity of graphene oxide compared to other carbon based materials studied, restraining the formation of pores. 24 Similar to previous samples, increase in weight percentage of CNT additive in 4a-c led to a decrease in the porosity and pore size of these samples.…”

Section: Morphologysupporting

confidence: 82%

“…It is expected that the highest values of these parameters appear at 9% of graphene in the mixture. 24 However, the authors do not support their result with any experimental data.…”

mentioning

confidence: 70%

“…Modeling of interactions between graphene and EVA matrix using molecular dynamics shows that the addition of graphene should lead to the increase of Young's modulus, yield strength, and glass transition temperature. 24 Both mechanical and thermal enhancements were attributed to the strong interfacial bonding between graphene additives and EVA matrix, which limited EVA chains mobility and flexibility, hence, allowing a better strength and thermal stability. It is expected that the highest values of these parameters appear at 9% of graphene in the mixture.…”

mentioning

confidence: 99%

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Carbon nanomaterials as additives to ethylene vinyl acetate copolymer foams for sport footwear applications

Lunchev

Tham

Lipik

et al. 2021

Polymers for Advanced Techs

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Ethylene vinyl acetate (EVA) copolymer foams with addition of 1.0, 2.5, and 5 wt% of carbon nanomaterials (graphene, graphene oxide, carbon nanotubes, and multiwalled carbon nanotubes) were fabricated. Properties of these foams were compared with reference sample (no additives) and samples containing carbon black. The following properties of these samples were examined: density, compressive stress (50% compression), impact behavior, thermal conductivity, and hydrophobicity. The morphology was studied using scanning electron microscopy. The samples were additionally characterized using thermal gravimetric analysis and differential scanning calorimetry.Increasing weight percentage of carbon-based additives led to foam structure with lower porosity and higher density. Samples with a higher degree of cross-linking were less dense ($10%) as compared to the reference sample and also displayed better mechanical and thermal properties. Increasing weight percentages of additives led to higher compressive strength and higher energy absorption. Samples with 5 wt% of additives and increased quantity of cross-linking agent exhibited great mechanical properties. Despite their lower density, these samples had higher values of compressive stress, 10%-15% higher than those of the reference sample, and higher energy return properties. All samples follow the trend of increasing values of compressive strength with the increase in density, for some samples, this correlation has quasi linear character. The obtained results show that EVA foams with the addition of carbon black, graphene, carbon nanotubes, and multiwalled carbon nanotubes have properties desirable in high-performance materials for sport footwear soles. Multiwalled carbon nanotube additives could be incorporated at low weight percentages and low degree of crosslinking into EVA matrix to achieve lower density and enhanced energy repulsion and cushioning effects.

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“…Organized alignment of polymer matrices can produce improved properties, more than that of randomly graphene distribution into composites. Graphene with ultra-large nanosheets was highly aligned with polyurethane nanocomposites and showed great improvements in electrical conductivity [27,28].…”

Section: Alignment Of the Graphene Layer Into The Polymer Matrixmentioning

confidence: 99%

Graphene Polymer Composites: Review on Fabrication Method, Properties and Future Perspectives

Daniel¹,

Hong²

2021

Adv. Sci. Technol. Res. J.

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Graphene as new material, due to its unique and novel properties has attracted extensive attention and in-depth research in the scientific community. Graphene, as a covalently bonded monolayer of carbon atoms with a hexagonal structure, is currently the thinnest material found in the world, and also makes it one of the world's best in terms of its properties [1]. Graphene, with this special structure, contains rich and novel physical phenomena, which make it show many excellent properties such as ultra-higqh carrier mobility, good thermal conductivity, excellent mechanical modulus (1 TPa), breaking strength (125 GPa), and also a superior gas barrier, high transparency, and high specific surface area [2]. Moreover, based on these extraordinary properties, graphene showed great potential application prospects and market value in different fields such as transportation, high-frequency electronic devices, flexible display, electrochemical biosensor, new energy battery, supercapacitor, aerospace, biomedical, etc. Graphene can also be used as an ideal nanofiller to reinforce the properties of composites, thus providing a broader application space for composite materials. Even a small amount of graphene addition to composite tends to increase the mechanical, electrical, and processing properties [1-4]. Hence, the addition of graphene into polymer composite has shown improvements of properties compared to pure polymer, significant changes in the mechanical, electrical, and thermal properties were proven, more than in the case of other materials. The polymer nanocomposites modified by graphene can be used in construction, automobile, aerospace, electronic, and medical applications, etc. The interaction between fillers and the polymer matrix at the interface has great importance for the performance of composites [5, 6]. As graphene is hard and very costly to produce, needs a lot of energy, and is difficult to control structure, coupled with other materials especially polymers, different alternatives were found by using modified graphene, such as graphene oxide (GO) and reduced graphene oxide (RGO) (Fig. 1), etc. provided more options which are considered easy to produce and showed a great improvement when combined with polymers. Generally, modified graphene (GO, RGO, etc) coupled with polymers and polymer composites can be possibly reached easily using various

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Effect of graphene on thermal stability and mechanical properties of ethylene-vinyl acetate: a molecular dynamics simulation

Cited by 19 publications

References 71 publications

High-Impact Polystyrene Reinforced with Reduced Graphene Oxide as a Filament for Fused Filament Fabrication 3D Printing

High-Impact Polystyrene Reinforced with Reduced Graphene Oxide as a Filament for Fused Filament Fabrication 3D Printing

Carbon nanomaterials as additives to ethylene vinyl acetate copolymer foams for sport footwear applications

Graphene Polymer Composites: Review on Fabrication Method, Properties and Future Perspectives

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