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In this work,HBA/HNA-GO composite was prepared by melt polycondensation via in situ polymerization,and the effects of GO contents on the structure and properties of composites were studied.The results proved that the thermal stability of HBA/HNA copolyester was enhanced with the increase of GO content.For example,the 1.2 wt%HBA/HNA-GO composite shows a 17.2oC improving in the 5%weight loss temperature in comparison with the pure TLCP.The work provides a good direction to further the development of high performance TLCPs.