Ethylene vinyl acetate/expanded graphite nanocomposites by solution intercalation: preparation, characterization and properties

George, Jinu Jacob; Bhowmick, Anil K.

doi:10.1007/s10853-007-2193-6

Cited by 95 publications

(59 citation statements)

References 22 publications

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“…This method was used to prepare poly(ethyleneco-vinyl acetate) reinforced with expanded graphite and a 100% increase in modulus was observed with 4% loading. [ 59 ] It has also been used to prepare poly(methylmethacrylate) composites with functionalized graphene sheets (FGS, obtained by thermal expansion of completely oxidized graphite oxide). Here, increments in the Young's modulus and ultimate strengths of 80% and 20% respectively, were reported at 0.1% w/w loading.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

et al. 2011

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Graphene constitutes a two dimensional sp2 hybridized carbon material with outstanding electrical and mechanical properties. To date, novel methods for producing large quantities of graphene and its derivatives (doped or functionalized graphenes, nanoribbons and nanoplatelets) are emerging, and research dedicated to the fabrication of polymer nanocomposites using graphenes has started. In this Research News, we summarize the synthesis and properties of graphene and its derivatives, and provide an overview of the latest research dedicated to the fabrication of polymer composites for different applications, including mechanical, electrical, optical and thermal. Some of the recently fabricated composites exhibit outstanding properties, however, it is vital to understand the chemistry and physics of the interphases established between the polymer and the graphene surfaces. The challenges in the fabrication of super robust and highly conducting composites using graphenes are also discussed. It is believed that graphene‐based polymer composites will result in commercial products if their interphases and reactivity are carefully controlled.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

et al. 2011

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“…8 for 5 volume % and no functionalization (0.6 W/mK). Experimentally, the effectiveness of plate-like GNPs in improving thermal conductivity varies considerably [10,20,21]. The analytical model is useful in exploring various parameters in addition to functionalization.…”

Section: Functionalized Graphite Nanoplatelet (Gnp) Compositesmentioning

confidence: 99%

Multiscale modeling of thermal conductivity of polymer/carbon nanocomposites

Clancy

Frankland

Hinkley

et al. 2010

International Journal of Thermal Sciences

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ABSTRACT:Molecular dynamics simulation was used to estimate the interfacial thermal (Kapitza) resistance between nanoparticles and amorphous and crystalline polymer matrices. Bulk thermal conductivities of the nanocomposites were then estimated using an established effective medium approach. To study functionalization, oligomeric ethylene-vinyl alcohol copolymers were chemically bonded to a single wall carbon nanotube. The results, in a poly(ethylene-vinyl acetate) matrix, are similar to those obtained previously for grafted linear hydrocarbon chains. To study the effect of noncovalent functionalization, two types of polyethylene matrices. --aligned (extended-chain crystalline) vs. amorphous (random coils) were modeled. Both matrices produced the same interfacial thermal resistance values. Finally, functionalization of edges and faces of platelike graphite nanoparticles was found to be only modestly effective in reducing the interfacial thermal resistance and improving the composite thermal conductivity.

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“…Hofmann elimination reaction resulted into decomposition of the intercalated organic ammonium salts of Cloisite 15A,which shows a mass loss of almost 40% in the temperature range 200-400 °C 30 . EVA shows two-step degradation related to deacetylation and main-chain decomposition 29 , while the PCL degrades in a single stage (around 390 to 400 °C) involving simultaneous occurrence of two types of reactions; random chain scission and unzipping from hydroxyl end leading to the formation of ɛ-caprolactone. The EVA/PCL blend shows three degradation steps with intermediatory thermal stability which are related to the degradation of the two polymers.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Synergistic Effect of EG and Cloisite 15A on the Thermomechanical Properties and Thermal Conductivity of EVA/PCL Blend

et al. 2016

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The purpose of this study was to investigate the synergy of expanded graphite (EG) and Cloisite 15A (C15A) on the thermal conductivity and thermomechanical properties of ethylene-vinyl acetate copolymer/poly (ɛ-caprolactone) (EVA/PCL) blend. Scanning electron microscopy (SEM) results showed that the blend had a phase separation, in which the PCL phase (appeared as droplets) was dispersed uniformly in the EVA matrix in all samples. The results from SEM and X-ray diffraction (XRD) showed that as the EG content increases, graphite sheets increase, leading to a high probability of re-stacking and poor dispersion as well, however the synergy rendered an increase in the storage modulus for the composite containing low content of EG (5phr) in both the EG and clay containing samples. The addition of EG showed a slight increase in thermal stability,but the presence of C15A decreased the onset of degradation of EVA/PCL blend. However, at high temperatures the synergistic effect of EG and C15A showed better thermal stability for EVA/PCL blend than EG alone. The addition and increase in EG content improved thermal conductivity of the EVA/PCL blend in both the clay containing and EG containing samples, however the clay-containing samples showed lower values compared to EG only.

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Ethylene vinyl acetate/expanded graphite nanocomposites by solution intercalation: preparation, characterization and properties

Cited by 95 publications

References 22 publications

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

Multiscale modeling of thermal conductivity of polymer/carbon nanocomposites

Synergistic Effect of EG and Cloisite 15A on the Thermomechanical Properties and Thermal Conductivity of EVA/PCL Blend

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