Long Term Durability Evaluation of Thermotropic Liquid Crystalline Polyester-based Nanocomposites for Automotive Applications
발표자
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초록
내용
Thermotropic liquid crystalline polyesters (TLCPs) with rigid main chains of wholly aromatic rings linked by ester groups are a family of high-performance engineering plastics noted for their high strength, modulus, and melting point. Accordingly, TLCPs have been employed in automotive parts, ovenware, electronic devices, etc. Especially for automotive applications, long-term durability is very critical. In this study, a stepped isothermal method was adopted as an engineering approach to estimate the long-term durability in thermal and mechanical performance of TLCP nanocomposites with different multiwalled carbon nanotube (MWCNT) contents. The moduli changes at each temperature step can be rescaled and shifted to generate a master curve, which was matched with the moduli predicted by the time-temperature superposition principle. This study demonstrates that the influence of the MWCNT content on the long-term mechanical performance in TLCP/MWCNT nanocomposites.