Synthesis and characterization of new optically active poly(azo-ester-imide)s via interfacial polycondensation

摘要

N,N'-Pyromelliticdiimido-di-L-amino acids(la-Id)were prepared from the reaction of pyromellitic dianhydride with the corresponding L-amino acids in a solution of glacial acetic acid/pyridine(3:2)at refluxing temperature.4,4'-sulfonyl bis(4,1-phenylene)bis(diazene-2,1-diyl)diphenol,4,4'-oxy bis(4,1-phenylene)bis(diazene-2,1-diyl)diphenol and 4,4'-methylene bis(4,1-phenylene)bis(diazene-2,l-diyl)diphenol,were prepared from 4,4'-diamino diphenyl sulfone,4,4'-diamino diphenyl ether,4,4'-diamino diphenyl methane,sodium nitrite and phenol following the general procedure of diazo coupling.Interfacial polycondensation method was used to prepare the corresponding poly(azo-ester-imid)s(PAEI_(1-12))in biphasic solution of water/dichloromethane.The resulting polymers(PAEIs)have been obtained in high yields having good inherent viscosities(0.32-0.57 dl g~(-1)),optical activities and thermal stabilities.