Enhanced mechanical, conductivity, and dielectric characteristics of ethylene vinyl acetate copolymer composite filled with carbon nanotubes

Abstract

We report high mechanical, dielectric, and thermal performance of carbon nanotubes (CNT) reinforced ethylene vinyl acetate (EVA) composites, fabricated using conventional melt extrusion processing. CNT have extremely high stiffness, electrical conductivity, and surface area, ensuring strong interactions with the polymer and effective reinforcement. The addition of CNT to EVA leads to an extremely high yield strength and Young’s modulus of the composites. The EVA composite produced, containing 5 wt% CNT, exhibited an almost 3-fold increase in Young’s modulus and a 2.2-fold improvement of yield strength compared to neat EVA. However, the composite maintained high deformation properties—a ductility of 1300%. Scanning electron microscopy analysis evidences the agglomeration of the CNT in the EVA/CNT composites. The EVA/CNT composites gained excellent electrostatic discharge properties—a surface resistivity in the range of 108 Ω/square. The observed thermal conductivity of the composites was increased by about 30% without losing the electrically insulating performance.

Highly Loaded Cellulose/Poly (butylene succinate) Sustainable Composites for Woody-Like Advanced Materials Application

“…The experimental density values ρ of the composites, obtained by the weighting method [39], are summarized in Table 1. The value of the parameter ρ *, which is defined as the apparent density of the polymer, was calculated by the equation reported elsewhere [40]. It could correspond to the decrease of the polymer density due to the pronounced drop in crystallinity observed in DSC.…”

Synergy effects in dielectric and thermal properties of layered ethylene vinyl acetate composites with carbon and Fe3O4 nanoparticles

“…The thermal diffusivity tends to decrease increasing temperature of the conductivity measurements because of polymer crystals melt; thus the thermal conductivity decreases because the conductivity of the amorphous regions is generally somewhat smaller …”

“…The temperature dependences of the thermal conductivity for the EVA composites were analyzed according to the well‐known Arrhenius equation: where E a is the activation energy and λ 0 is the pre‐exponential factor.…”

Electrical and Mechanical Properties of Sugarcane Bagasse Pyrolyzed Biochar Reinforced Polyvinyl Alcohol Biocomposite Films

“…A large number of studies on biochar based biocomposite were conducted using various polymers with manifold thermal, mechanical, and electrical properties in some prominent works. For example, Poly (lactic acid), Poly (ethylene-alt-maleic anhydride) with microwave assisted biochar by Khui [16], polylactic acid with biochar nanoparticle by Sobhan et al [17], polylactic acid with activated biochar by Sobhan et al [18], epoxy with Bael shells and arhar stalk biochar by Minugu et al [19], polyvinyl alcohol with corn straw derived biochar along with silver nano particle by Zhao et al [20], polyesters with rice husk pyrolyzed biochar by Richard et al [9], polyamides with biochar by Huber et al [21], styrene-butadiene rubber (SBR) with maple wood waste derived biochar by Peterson and Kim [22], poly (vinyl alcohol) with wood biochar (PVA) by Nan et al [6], epoxy with three types of biochar (plastic waste biochar, wood shavings biochar, and pine cone char) by Ahmetli et al [23], poly (trimethylene terephthalate) (PTT) with lignin carbonized biochar by Myllytie et al [24], polypropylene with pine wood biochar by Das et al [10,11], poly (trimethylene terephthalate/poly (lactic acid) (PTT/PLA) blend with Miscanthusbased biochar by Nagarajan et al [25], polyurethane with carbon nanotube and graphite oxide particles by Gaidukovs et al [26], and ethylene vinyl acetate copolymer composite filled with carbon nanotubes to investigate electrical and mechanical characteristics by Gaidukovs et al [27]. Povilas et al [28] investigated thermal and dielectric properties of the composites prepared with carbon and Fe 3 O 4 nanoparticles and layered ethylene vinyl acetate.…”