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A new kind of asymmetrical ether diamine,3,4’-bis(4-aminophenoxy)benzophenone(BABP),was synthesized from the nucleophilic substitution reaction of 4-chloronitrobenzene and 3,4’-dihydroxybenzophenone in the presence of potassium carbonate,followed by catalytic reduction with SnCl_2-6H_2O and concentrated hydrochloric acid.The prepared diamine was employed in the preparation of a novel polyimide containing asymmetrical diaryl ether segments via the polycondensation of it with BTDA by a two-step method.The resulting polyimide exhibits excellent solubility,film-forming capability and high thermal resistance.
A new kind of asymmetrical ether diamine, 3,4’-bis (4-aminophenoxy) benzophenone (BABP), was synthesized from the nucleophilic substitution reaction of 4-chloronitrobenzene and 3,4’-dihydroxybenzophenone in the presence of potassium carbonate. by catalytic reduction with SnCl_2-6H_2O and concentrated hydrochloric acid. The prepared diamine was employed in the preparation of a preparation of a polythene containing asymmetrical diaryl ether segments via the polycondensation of it with BTDA by a two-step method. The resulting polyimide exhibits excellent solubility, film-forming capability and high thermal resistance.