Mechanical properties of low-density polyethylene filled by graphite nanoplatelets

Abstract

The mechanical properties of GNP/LDPE nanocomposites (graphite nanoplatelets/low density polyethylene) have been investigated, in order to establish the effect of nanoscale reinforcement within the polymer matrix. Results show that the presence of the filler does not involve a change in the microscopic structure of the polymer. However, on a macroscopic scale, GNPs limit the mobility of the polymer chains, resulting in an increase in stiffness for the final composite. Orientation of GNPs within the LDPE matrix is also an important issue that affects mechanical properties and it has been evaluated by testing nanocomposites made by different manufacturing techniques (compression moulding and blown extrusion). The comparison between the experimental data and the Halpin-Tsai model shows that the orientation of GNPs due to the extrusion process leads to values of tensile modulus higher than that obtained with the randomly oriented disposition resulting from the compression moulding technique.

Synthesis and Characterization of Highly Intercalated Graphite Bisulfate

“…In addition, GICs are very important in graphite manufacturing [13] and potentially useful in other industrial fields like that of superconductors [14, 15], heterogeneous catalysts [16], anode materials [17], and pyrophoric reactants stabilization [17]. Currently, GICs are used in the preparation of expandable graphite, graphite nanoplatelets (GNP), and single-layer graphene [18–21]. Graphite nitrate and graphite bisulfate have the ability to significantly expand by thermal heating.…”

Effect of surfactant and electron treatment on the electrical and thermal conductivity as well as thermal and mechanical properties of ethylene vinyl acetate/expanded graphite composites

“…[1][2][3][4][5][6][7][8][9] One way to improve the thermal and electrical conductivity, as well as the viscoelastic behavior and mechanical properties, of these materials is to combine polymer matrices with highly conductive fillers. However, there are many industrial applications such as circuit boards, heat exchangers, electromagnetic shielding devices, antistatic plastics, packaging, and others that require an improvement in both the thermal and electrical conductivity of polymers.…”

Laser-Induced Thermal Expansion of H2SO4-Intercalated Graphite Lattice

“…(1) graphite intercalation by sulfuric acid after mild oxidation by nitric acid or other strong oxidizer such as potassioum chlorate or potassium permangamate; (2) thermal expansion of sulfuric acid intercalated graphite to obtain expanded graphite (EG) and (3) sonoacustic exfoliation of the expanded graphite filaments [1][2][3].…”