Mechanical Properties and Tensile Fatigue of Graphene Nanoplatelets Reinforced Polymer Nanocomposites
ABSTRACT Graphene nanoplatelets (GNPs) are novel nanofillers possessing attractive characteristics, including robust compatibility with most polymers, high absolute strength, and cost effectiveness. In this study, GNPs were used to reinforce epoxy composite and epoxy/carbon fiber composite laminates to enhance their mechanical properties. The mechanical properties of GNPs/epoxy nanocomposite, such as ultimate tensile strength and flexure properties, were investigated. The fatigue life of epoxy/carbon fiber composite laminate with GPs-added 0.25 wt% was increased over that of neat laminates at all levels of cyclic stress. Consequently, significant improvement in the mechanical properties of ultimate tensile strength, flexure, and fatigue life was attained for these epoxy resin composites and carbon fiber-reinforced epoxy composite laminates.
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ABSTRACT: This paper deals with the fabrication and characterization of raw and surface-modified Grewia optiva fibers reinforced unsaturated polyester (UPE) matrix based composites. Raw and surface-modified fibers are used in different proportions (10, 20, 30, and 40%) for the fabrication of composites. The fiber proportion is optimized by studying various mechanical properties such as tensile, compressive, and flexural strength of UPE matrix-based composites. After the optimization of fiber loadings, the optimized samples were evaluated for their physicochemical, thermal, fire retardancy, and biodegradability properties. Physicochemical and thermal stability of the composites is improved after fibers’ surface modification. The effect of different fire retardants (magnesium hydroxide and zinc borate) on the fire-retardant behavior of polymer composites is also evaluated. Biodegradability of polymer composites is checked by using a soil burial method.Advances in Polymer Technology 12/2014; 33(4). DOI:10.1002/adv.21433 · 1.10 Impact Factor