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Effect of Water and Ethanol Immersion on the Thermal Conductivity of Polyethylene Fiber–Reinforced Epoxy Composites
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Effect of Water and Ethanol Immersion on the Thermal Conductivity of Polyethylene Fiber–Reinforced Epoxy Composites
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Journal Article
Effect of Water and Ethanol Immersion on the Thermal Conductivity of Polyethylene Fiber–Reinforced Epoxy Composites
2026
Overview
Polymer-based composite materials are widely used in engineering applications due to their lightweight structure and tunable physical properties. However, exposure to environmental conditions such as moisture and chemical solutions can significantly influence their thermal performance. This study investigates the effect of immersion media and reinforcing materials on the thermal conductivity of epoxy-based composites reinforced with polyethylene fibers. Composite specimens were fabricated using epoxy resin as the matrix material and polyethylene fibers as reinforcement with volume fractions of 15 and 20%. The samples were immersed in tap water and ethanol solutions for different exposure periods. Thermal conductivity measurements were performed before and after immersion to evaluate the influence of chemical absorption on heat transfer behavior. The experimental results revealed that unreinforced epoxy exhibited higher thermal conductivity than fiber-reinforced composites. Furthermore, polyethylene fiber reinforcement significantly reduced thermal conductivity due to increased phonon scattering within the polymer matrix. Water immersion led to a noticeable increase in thermal conductivity, whereas ethanol immersion resulted in a reduction of thermal conductivity values with prolonged exposure time. The findings confirm that polyethylene fibers enhance the resistance of epoxy composites to liquid absorption; however, extended immersion causes microstructural degradation that adversely affects thermal performance. These results provide useful insights for the design of polymer composite materials intended for applications under humid or chemically aggressive environments.
Publisher
Pleiades Publishing,Springer Nature B.V
Subject
