新型偶氮苯类的超支化大分子的合成

Synthesis of Novel Hyperbranched Polymer of Azobenzene

以对硝基苯胺、亚硝酸钠、盐酸、环氧氯丙烷为主要原料,经过重氮化、偶合、Williamson反应合成了对硝基偶氮苯酚(中间体A)和对硝基偶氮苯缩水甘油醚(中间体B);以一定配比的偏苯三酸酐和环氧氯丙烷为原料经过酯化反应合成了一种全羧基超支化聚酯;利用超支化聚酯末端的羧基与偶氮苯缩水甘油醚的环氧基团开环反应,制备了偶氮苯功能化的超支化聚酯,并对其进行了表征。

4-hydroxy-4 ,-nitro azobenzene （ intermediate A）, glycerin monoether of 4 -[ （p-nitrophenyl） azoxy] phenol （intermediate B） were synthesized from 4-nitroaniline, sodium nitrite, hydrochloric acid and epichlorohydrin by means of diazo-reaction, coupling and Williamson reaction.The hyperbranched polyesters with terminal- COOH groups were prepared from trimellitic anhydride （TMA） and epichlorohydrin （ECH） by means of esterification. The carboxyl groups on the hyperbranched polyesters were transformed into azobenzenes by means of ring opening reaction with glycerin monoether of 4-[ （p-nitrophenyl） azoxy] phenol.The monomers and polymers were characterized by means of FTIR, UV/Vis, DSC, ^1H-NMR and GPC.