Effect of Nanoclay and Foaming Conditions on the Mechanical Properties of HDPE–Clay Nanocomposite Foams

Abstract

The effects of nanoclay and foaming conditions on the foam morphology and mechanical properties of microcellular high density polyethylene (HDPE)–clay nanocomposite foams are investigated. Clay loadings of 0.5, 1.0, and 2.0 wt.% are used and the microcellular HDPE–clay nanocomposite foams are prepared by batch foaming process using CO2. Uniaxial tensile tests are performed with the nanocomposites and its foams. It is demonstrated that nanoclays in HDPE, with proper clay contents, have a role to improve the mechanical properties, such as elastic modulus and tensile strength. In addition, tensile properties of HDPE–clay foams are reinforced when compared to that of pure HDPE foams. In the case of both nanocomposites and nanocomposite foams, the mechanical properties are improved most at 0.5 wt.% clay loadings.