Physico–mechanical properties of poly(ethylene‐co‐vinyl acetate)/acrylonitrile‐butadiene rubber/multi‐walled carbon nanotubes nanocomposites

Abstract

The influence of multi-walled carbon nanotubes (MWCNTs) on thermal, mechanical and wetting properties as well as rheological behavior of poly(ethylene-co-vinyl acetate) (EVA)/acrylonitrile-butadiene rubber nanocomposites were studied. The solid surface free energy (γ s ), work of adhesion (W A ), interfacial free energy (γ sl ), spreading coefficient (S c ) and Girifalco-Good's interaction parameter (ϕ) were calculated for the materials fabricated.The results showed that the contact angle and γ sl decreased; however, γ s , W A , S c , and ϕ increased with the increase in MWCNTs content. The maximum tensile strength and toughness were obtained for the nanocomposite containing 1 wt% nanofillers. It was also found that both of the relaxation ratio (Rr) and relaxation rate index (n) decreased with increasing in the carbon nanotubes (CNTs) concentration. The results designated that the values of Rr and n for the nanocomposite containing 7 wt% MWCNTs were 19% and 60% smaller than those of the unfilled blend, respectively. The Casson plot analysis indicated that the yield stress of the molten materials incremented with the increase in MWCNTs loading according to a quadratic equation. The analysis of crystallization exotherms and melting endotherms revealed that CNTs triggered the crystallization process at slightly higher temperature, however, melting point slightly and the rate of nucleation noticeably reduced with the increase in the nanofillers content.

Extrusion foaming of multiphasic polyethylene/ethylene-vinyl acetate copolymer/carbon nanotube mixtures: Tailoring foam properties by selective localization of nanoparticles

“…16 The impacts of nanofiller characteristics on the performance of unfoamed polymeric nanocomposites have been extensively studied. [17][18][19] However, the effects of nanofiller dispersion and localization state on the properties of polymer nanocomposite foams are more complex than that of solid polymer nanocomposites.…”

Constructing Fe2O3 particles uniformly grown on graphene oxide as additives for ethylene vinyl acetate copolymer thermal stability, thermal conductivity and anti‐static performance enhancement

“…[ 2 ] EVA absolutely dominant the electronic and machinery encapsulating materials because of commercialized, facile forming processibility, and lightweight. [ 3 ] However, EVA's inherent thermal conductivity and volume resistivity are rather poor which makes it difficult to achieve the thermal and electronic conductivity requirements of encapsulating materials. Therefore, development of EVA with higher thermal conductivity and lower volume resistivity is on urgent demand.…”

Crystallization kinetics and nanomechanical behavior of biobased poly(ethylene 2,5‐furandicarboxylate) reinforced with carbon nanotubes

“…[28] At the same time, the introduction of a reinforcing filler has been proven to enhance the elastic modulus and hardness of the matrix for both states. [29][30][31][32][33] Papadopoulos et al studied the effect of various inclusions (MMT, Graphene nanoplatelets, CNTs, and Halloysite) and showed that incorporating any of the aforementioned fillers improved elastic modulus and hardness. [34] Similar findings were reported by Klonos et al regarding the nanomechanical behavior of PBF filled with 1 wt% of MMT and functionalized MMT.…”

“…Thus, PEF/MWCNTs nanocomposites (mentioned as PEF/CNTs in this manuscript) were in situ prepared, containing 0, 0.5, 1, and 2.5 wt% filler. [36,37] Carbon nanotubes were specifically selected as a reinforcing filler due to their excellent nucleating efficiency and mechanical properties' reinforcing effect even when incorporated into a polymer matrix at low loadings [33,[38][39][40][41][42][43][44] minimizing the cost of the nanocomposites' production. Furthermore, the percolation threshold of CNTs is much lower compared to other reinforcing fillers (metallic particles, carbon black, etc.)…”