Mechanical Properties and Morphology of Composites Based on the EVA Copolymer Filled with Expanded Graphite

Krupa, Igor; Çeçen, Volkan; Boudenne, Abderrahim; Križanová, Zuzka; Vávra, I.; Srnänek, R.; Radnóczi, G.

doi:10.1080/03602559.2012.704114

Cited by 12 publications

(11 citation statements)

References 22 publications

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“…The large surface area and numerous pores of EG, in addition to some functional groups, existed on the solid surface and facilitates its melt‐processing with polymers. The morphology of EVA‐EG nanocomposites has been studied by Krupa et al . The authors have found that the edges and middle surfaces of EG have different morphologies and extent of exfoliation in the EVA matrix.…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, the dispersion and distribution of EG nanoparticles in polymeric matrices are not as good as expected; especially in nanocomposites prepared by direct melt‐mixing processes under limited time. This state of dispersion leads to many nanoparticle aggregates, which causes weak interfacial interactions of polymer chains with filler surfaces and poor mechanical properties . As a useful remedy, the masterbatch mixing technique can be applied for achieving homogeneous distribution of the nanofillers within the polymer matrix .…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the poor state of dispersion, EG‐filled nanocomposites based on thermoplastics prepared via melt‐mixing processes have not attracted much attention. Among different investigated thermoplastic matrices, only few works are dedicated to the characterization of nanocomposites based on ethylene‐vinyl acetate (EVA) copolymer melt compounded with EG . The advantages of the incorporation of EG in polymer matrices, such as EVA, are the simultaneous improvements in electrical conductivity, mechanical, and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

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Thermal behavior and electrical conductivity of ethylene vinyl acetate copolymer/expanded graphite nanocomposites: Effects of nanofiller size and loading

Yousefzade

Hemmati

Garmabi

et al. 2014

J Vinyl Addit Technol

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Nanocomposites based on ethylene-vinyl acetate (EVA) copolymer and expanded graphite (EG) were prepared using direct and two-step melt-mixing processes. The effect of elongational flow on the dispersion of EG nanoparticles in the polymeric matrix was investigated by thermal analysis and electrical conductivity measurements. Two types of EG having different aspect ratio were applied to prepare the nanocomposites. The nanocomposites containing higher aspect ratio nanofiller have shown higher values of transition temperature (Tg) and a stronger reinforcing effect of EG. The evaluation of EVA crystallization behavior has clarified that both the EG loading and particle size have noticeably influenced the crystallization characteristics of EVA. The restrictions imposed by nanoparticles on molecular motion and, correspondingly, the crystal growth stage have been the most notable effect of EG nanopartciles on the EVA crystallization behavior. Moreover, the presence of EG nanofiller has intensified the formation of a second-type of EVA crystals during long annealing time. Furthermore, chemically crosslinking of EVA chains has led to the formation of smaller crystals with more uniform size. J. VINYL ADDIT. TECHNOL., 00:000-000,

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal behavior and electrical conductivity of ethylene vinyl acetate copolymer/expanded graphite nanocomposites: Effects of nanofiller size and loading

Yousefzade

Hemmati

Garmabi

et al. 2014

J Vinyl Addit Technol

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“…Several papers were published on conductive thermoplastic polymer nanocomposites reinforced with EG prepared by in situ polymerization or solution intercalation, but very little has been published on the preparation of these composites using melt‐blending intercalation. Krupa et al studied the mechanical properties and morphology of composites based on an EVA copolymer mixed with EG. Their copolymer contained 14% vinyl acetate.…”

Section: Introductionmentioning

confidence: 99%

Effect of surfactant on EG dispersion in EVA and thermal and mechanical properties of the system

Sefadi

Luyt

Pionteck

2014

J of Applied Polymer Sci

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The influence of expanded graphite (EG) and sodium dodecyl sulfate (SDS) modified EG on the structure, thermal stability, and mechanical properties of ethylene vinyl acetate (EVA) was investigated in this study. The EVA filled with EG platelets, with and without anionic SDS modification, was prepared by melt mixing using a Brabender Plastograph mixer. The extent of dispersion and morphology of the composites were characterized using scanning electron microscopy (SEM), optical microscopy (OM), and Xray diffraction (XRD). The optical microscopy results show better distribution of the modified EG platelets in the EVA matrix, while the SEM results show an improved interfacial adhesion between the polymer and the SDS-EG particles. Both the EVA18 copolymer and the EG platelets have monoclinic phases, and both EG and SDS do not seem to have any influence on the melting and crystallization behavior of the EVA18. The addition of EG enhanced the thermal stability of EVA18, and this stabilizing influence was further improved when the EG was treated with SDS. All the tensile properties of EVA/EG improved after surface modification. The storage modulus of EVA generally increased with increasing both the unmodified EG and the SDS modified EG content. There was a shift in the T g to higher temperatures with an increase in both the EG and modified EG content. The a-relaxation peak in the SDS modified EG curves was less intense than the b-relaxation peak, even for the untreated EG composites.

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“…With the aim to explore new possibilities of use of plastic material in the agricultural sector, characterized by a lower environmental impact, new materials are currently developed. The main actual technically interesting solutions are those connected with new plastic material [21,27,28,36,41,43,44,46,82] characterized by very limited thickness or by longer useful life, with degradable material (mainly bio-based), or through the improvement of recycling techniques, able to transform the post-consume plastic material into a new secondary product [2,26,40,58,65,66,70,71,73,75,76] . This article presents, on the basis of an analysis about the main technical achievements on the improvement of the engineering properties of agricultural plastic film, a general review about actual innovative material and new techniques of mechanical recycling of agricultural plastic film.…”

Section: Introductionmentioning

confidence: 99%

Innovative Material and Improved Technical Design for a Sustainable Exploitation of Agricultural Plastic Film

Picuno

2014

Polymer-Plastics Technology and Engineering

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The use of plastic material in agriculture has been growing during the last decades thanks to the benefits it provides in agricultural production. The durability of plastic films is related to the meteorological and environmental conditions, as well as to the consequence of stress they are subjected to during their operational life. An improvement in the technical design of the agricultural plastic film is connected with a closer link between its chemical formulation and the engineering performance. The present article presents a general review about innovative material and new techniques for mechanical recycling of agricultural plastic film

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Mechanical Properties and Morphology of Composites Based on the EVA Copolymer Filled with Expanded Graphite

Cited by 12 publications

References 22 publications

Thermal behavior and electrical conductivity of ethylene vinyl acetate copolymer/expanded graphite nanocomposites: Effects of nanofiller size and loading

Thermal behavior and electrical conductivity of ethylene vinyl acetate copolymer/expanded graphite nanocomposites: Effects of nanofiller size and loading

Effect of surfactant on EG dispersion in EVA and thermal and mechanical properties of the system

Innovative Material and Improved Technical Design for a Sustainable Exploitation of Agricultural Plastic Film

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