Preparation and Characterization of Aramid Nanofiber-Reinforced Thermotropic Liquid Crystalline Polyester Nanocomposites
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초록
내용
Recently, fiber-reinforced polymer composites have received enormous attention in aerospace, automotive, electrical industries, etc. Thermotropic liquid crystalline polyesters (TLCPs) are known as super engineering thermoplastic materials with outstanding mechanical performance, chemical resistance, and thermal resistance. Aramid nanofibers (ANFs) have been used in polymer reinforcement and toughening sectors owing to their high aspect ratio, large specific surface area, excellent mechanical properties, and thermal resistance. To attain TLCP composites with enhanced long-term mechanical and thermal durability, ANFs, which were manufactured through a deprotonation reaction of aramid fibers in KOH/DMSO solution, were introduced into TLCP through a melt-compounding process. The morphology and microstructures of TLCP/ANF nanocomposites were characterized using SEM and FT-IR spectroscopy. The thermal, rheological, and mechanical properties were analyzed using DSC, TGA, rheometer, and DMA.