Effect of Graphene and Carbon Nanotube on Low‐Density Polyethylene Nanocomposites

Abstract

The nanocomposites of low-density polyethylene contain graphene (LDPE/Gr) and low-density polyethylene contains carbon-nanotubes (LDPE/CNTs) with different Gr loadings (0.5, 1, and 3 wt%) were formulated with a melt-mixing method. The distribution of Grs in LDPE was detected by scanning electron microscopy. In this study, morphological, electrical, thermal, tensile, and rheological properties of nanocomposites were comparatively investigated. The outcomes were reviewed and it was recognized that LDPE/Gr nanocomposites reveal superior properties than LDPE/CNTs nanocomposites at the same loadings. The superior performance of LDPE/Gr nanocomposites attributes to the large aspect ratio of Gr and its two dimensional flat surfaces which effect in increasing physical interlinking with LDPE chains and expanded the interface zone at filler-LDPE interface. It was also identified that the achieved results for LDPE/CNT nanocomposites, which has a compact surface area and linkage with LDPE, are less noticeable than similar Gr compounds due to higher interfacial interactions between Gr and LDPE. The thermomechanical results of LDPE/Gr nanocomposites have been studied and the influence of nanoscaled strengthening in the thermoplastic matrix has been investigated. The existence of Gr limits the flexibility of LDPE chains, increases the rigidity and the strength of the LDPE-nanocomposites. This study compares how a flat or roll structure of carbon nanostructure additive (Grs vs. CNTs) can change the various properties of LDPE nanocomposites. J. VINYL ADDIT. TECHNOL., 00:000-000, 2018.

Hybrids nanocomposites based on a polymer blend (linear low‐density polyethylene/poly(ethylene‐co‐methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube)

“…It has been observed that in many of the literature studies using similar matrices, [ 62–67 ] the amount of graphene and CNT used in these studies ranges from 1.6 to 3.3 times higher than in the work presented in this article to achieve conductivity values up to 1000 times lower than those shown in Figure 8. As shown in Figure 8, the abrupt increase in the electron conductivity from 10 −12 S/cm (nonmodified polymer matrix) to 10 −5 ‐10 −4 S/cm (nanocomposites), indicates a higher degree of connectivity within the embedded conducting phase, suggesting that electric percolation was attained.…”

Experimentation and optimization of wear behavior on polytetrafluoroethylene composites using response surface methodology and bald eagle search optimization

“…This is due to the better load carrying capability of different reinforcing particulates, resulting in less friction film with suppressed abrasion rates. [12,13] The input process parameters like sliding velocity, sliding distance, and the application of load are the major influencing factors of increased wear rate behavior of composites. [14,15] The graphite filler acted as a solid lubricant and exhibited reductions in COF ($27% on average) and mass loss ($4.2 times lower on average).…”

Preparation of flexible, highly conductive polymer composite films based on double percolation structures and synergistic dispersion effect

“…Consequently, the percolation threshold decreases and the conductivity increases, and the consumption of CNTs as well as the production cost are reduced. [14][15][16] Liu et al proposed CNT/Gr/thermoplastic polyurethane (TPU) conductive composites. When CNT is added with a specified content of 0.255 vol%, the percolation threshold of Gr is 0.006 vol%, which is lower than that of CNT/TPU nanocomposites.…”