Enhanced Thermomechanical Properties of ZrO 2 Particle Reinforced Epoxy Nanocomposite
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JMEPEG https://doi.org/10.1007/s11665-020-05350-3
Enhanced Thermomechanical Properties of ZrO2 Particle Reinforced Epoxy Nanocomposite Kaushal Kumar, P.K. Ghosh, Arun Kumar, and Ompal Singh Submitted: 5 April 2020 / Revised: 31 October 2020 / Accepted: 8 November 2020 The present work is focused on the outcome of ZrO2 nanoparticle content variation over viscoelastic, mechanical and thermal properties of epoxy resin. For this, ZrO2–epoxy nanocomposites were prepared using ultrasonic dual mixing technique that consists of simultaneous employing ultrasonic mixing with a rotating impeller. For dynamic mechanical analyses (DMA), a single cantilever mode measurement was performed on neat as well as ZrO2–epoxy nanocomposites to determine the storage modulus, tand value and glass transition temperature. Cross-linking density in the rubbery region of composite materials was also identified by DMA analyses. Tensile properties of prepared nanocomposites were measured using universal tensile machine. 4 wt.% ZrO2–epoxy nanocomposite material gives maximum enhancement in storage modulus and tensile strength about 70 and 34% as compared to neat epoxy. Thermal gravimetric analysis (TGA) revealed the improved thermal stability of ZrO2–epoxy composite materials. The uniformity of ZrO2 nanoparticles distribution in epoxy matrix was examined using field emission scanning electron microscopy (FESEM). Keywords
dynamic mechanical properties, polymer matrix composites (PMCs), thermal gravimetric analysis (TGA), ultrasonic dual mixing
1. Introduction The thermosetting epoxy-based polymers are widely used materials in structural polymer composites, surface coating technology, paints manufacturing, adhesives, aerospace, automobiles and other engineering applications (Ref 1-3). The excellence of epoxy materials in industries is due to their better chemical and corrosion resistance, low shrinkage and superior thermal as well as mechanical properties (Ref 4). Epoxy materials have the ability to work in various environmental conditions. The cured epoxy matrices showed three-dimensional highly cross-linked network structure. The properties of epoxy materials are constrained in a variety of applications due to the high level of cross-linking density that is guided to inherent brittle nature of materials and low toughness. Different studies have been done to improve the toughness as well as other properties such as crack resistance, dynamic mechanical and thermal stability of epoxy resin by the incorporation of different types and amount of nanofillers in matrix (Ref 5, 6). The homogeneous dispersion and breaking of nanoclusters inside the polymer matrix are two major challenges for nanocomposites preparation (Ref 7). Cluster size and dispersion of nanofillers in polymer matrix reveal the positive
Kaushal Kumar, Arun Kumar, and Ompal Singh, Department of Physics, J.C. Bose University of Science and Technology, YMCA Faridabad, Faridabad, Haryana 121006, India; and P.K. Ghosh, Department of Metallurgical and Materials Engineering, Indian Institute of
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