Synthesis and Characterization of Aromatic Polyamides Derived from New Phenylated Aromatic Diamines

摘要: Four new phenylated aromatic diamines, 1,4-bis(4-amino-3,5-diphenylphenyl)benzene (1a), 1,3-bis(4-amino-3,5-diphenylphenyl)benzene (1b), 1,4-bis(4-aminophenyl)-2,3,5-triphenylbenzene (2a), and 1,4-bis(4-aminophenyl)-2,3,5,6-tetraphenylbenzene (2b) were synthesized polymerized with terephthaloyl chloride (TPC) isophthaloyl (IPC). All the polyamides showed high thermal stability 5% weight-loss temperatures in range of 466–524°C air or nitrogen, no melting peak below their decomposition temperatures. The polymers containing m-catenation had glass transition 275–349°C, soluble N-methyl-2-pyrrolidone (NMP). rigid rod-like consisting all para-oriented linkages clear transition. In polymers, polymer 2a/TPC good solubility NMP, preliminary optical microscope observation for 20% solution an anisotropic property.