| 초록 |
Due to the high thermal stability, good chemical resistance, good mechanical properties as well as good electrical and dielectric properties, polyimide (PI) films and fibers have been used in a wide range of fields including aerospace, automotive, chemical and electronic industry. Especially, they are strong in high temperature use to maintain their performance at higher temperature. Much efforts have still been taken to further increase higher-temperature resistance and flame retardancy. In this work, PI containing the phosphorous groups was synthesized by copolymerization with phosphorous-containing monomer to enhance the thermal stability and flame retardant behavior. Synthesis of phosphorus containing monomers and co-PI was confirmed by FT-IR and NMR analysis. The thermal stability and mechanical properties of neat PI and phosphorus-containing co-PI were measured and compared by TGA, LOI and UTM. |
