Molecular spectroscopy(electronic,FT-IR,NMR),methods of thermal and elemental analysis were used for the first time to describe the process of thermo-oxidative oligomerization of 1,3-bis-(4-aminophenoxy)benzene.Introd...Molecular spectroscopy(electronic,FT-IR,NMR),methods of thermal and elemental analysis were used for the first time to describe the process of thermo-oxidative oligomerization of 1,3-bis-(4-aminophenoxy)benzene.Introduction of this monomer into linear and network copolymers makes it possible to improve processability,mechanical strength and heat resistance of materials.The structures of copolymers obtained by thermo-oxidation of the diamine in various thermal regimes were studied.It was demonstrated that during prolonged heating of this diamine in air in the temperature range from 220 to 320°C,oligomeric aromatic diamines were formed;these products contained fragments of benzenoid and quinoid types.展开更多
文摘Molecular spectroscopy(electronic,FT-IR,NMR),methods of thermal and elemental analysis were used for the first time to describe the process of thermo-oxidative oligomerization of 1,3-bis-(4-aminophenoxy)benzene.Introduction of this monomer into linear and network copolymers makes it possible to improve processability,mechanical strength and heat resistance of materials.The structures of copolymers obtained by thermo-oxidation of the diamine in various thermal regimes were studied.It was demonstrated that during prolonged heating of this diamine in air in the temperature range from 220 to 320°C,oligomeric aromatic diamines were formed;these products contained fragments of benzenoid and quinoid types.
