Thermal and environmental analyses of epoxy-based composites
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ORIGINAL RESEARCH
Thermal and environmental analyses of epoxy‑based composites S. Murugan1 · P. R. Thyla2 · N. Mahendrakumar2 · K. N. Manojkumar2 · A. Siddarth2 Received: 15 May 2020 / Accepted: 4 October 2020 © Iran Polymer and Petrochemical Institute 2020
Abstract This study aims to obtain pebble and epoxy composites with low thermal conductivity, low water absorption and minimal porosity. The effects of filler size, weight percentage of pebble and epoxy, aggregate size and curing time of the composites were evaluated. The ANOVA of S/N ratio was also performed to determine the effect of thermal conductivity, water absorption and porosity of the composites. The experiments were designed as per the Taguchi L27 orthogonal array. The results indicated that the effect of thermal conductivity improved slightly with 35% (wt) of epoxy resin present in the composite and the higher thermal conductivity was observed in the composite with 15% (wt) of epoxy resin. Water absorption and porosity results were found which showed that this composite with 15% (wt) epoxy resin content yielded better results when compared to the composite with 35% (wt) epoxy resin content. The embedded composites were characterized using Fourier transform infrared (FTIR) spectra to study the effect of chemical treatment of pebble/epoxy composite. The morphological studies of the fractured surfaces of the epoxy composites were performed by scanning electron microscopy. Keyword Pebble stone · Epoxy · Thermal conductivity · Water absorption · Porosity
Introduction Thermal conductivity and its resistance toward environmental degradation make the resin system especially attractive for machine tool structures in gravel, granite, fiber and reinforcement. Machine tool structures may influence the static, dynamic, modal, tribological, and thermal properties of the materials [1–3]. During normal machining with machine tools, their cutting tools are moved with nominal feed rates, while the feed rates are switched to a rapid traverse mode during the transfer of cutting tools without contacting work pieces (air-cutting time). The selection of alternative materials for the machine tool structure should have excellent thermal and mechanical properties. Composite material gives excellent properties for structures with high-speed machine tools [4–6].
* S. Murugan [email protected] 1
Department of Mechanical Engineering, Seshasayee Institute of Technology, Tiruchirappalli, Affiliated To Directorate of Technical Education, Chennai, Tamil Nadu, India
Department of Mechanical Engineering, PSG College of Technology, Coimbatore, Affiliated To Anna University, Chennai, Tamil Nadu, India
2
Epoxy-based composite materials have good chemical resistance, low thermal conductivity, workability, high strength to weight ratio and excellent dynamic properties. Water absorption is also essential for machine tool structure in manufacturing process [7–9]. The characteristics exhibited by polymer concrete structures were studied by varying the compositions of its in
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