由苯-1,2,4-三羧酸-1,2-酐和二乙醇胺合成结构非对称超支化聚(酰胺-酯)

通过准发散法和一步法由苯 1 ,2 ,4 三羧酸 1 ,2 酐 (BTAA)和二乙醇胺 (DEA)合成了新型水溶性结构非对称超支化聚 (酰胺 酯 ) .聚合物的端基可通过BTAA与DEA的加料比来调节 .产物结构经FTIR ,1 H NMR和TGA进行了表征 .在一步法中 ,当BTAA于DEA的加料比大于 2 0 4时 ,反应体系不易凝胶 ,当加料比小于 2时 ,体系容易发生交联 .在准发散法中 ,不用中间分离过程 ,采用合成树状大分子发散法相同的加料方式 ,可得到大分子产物

SYNTHESIS OF ASYMMETRIC HYPERBRANCHED POLY(AMIDE-ESTER)S FROM BENZENE-1,2,4-TRICARBOXYLIC ACID-1,2-ANHYDRIDE AND DIETHANOLAMINE

A new kind of water-soluble asymmetric hyperbranched poly(amide-ester)s was synthesized by direct polycondensation of benzene-1,2,4-tricarbonylic acid-1,2-anhydride (BTAA) and diethanolamine (DEA) via pseudo-divergent or one-step approach.The terminal groups of the hyperbranched polymer can be controlled by the feed molar ratio of BTAA to DEA.The resulting hyperbanched poly(amide-ester) was characterized by FTIR spectra, 1H-NMR spectra,and TGA.No gelation was observed when the feed molar ratio of BTAA to DEA was higher than 2.04 in one step approach,while gelation did occur when the ratio was lower than 2.In pseudo-divergent approach,it was not necessary to separate the obtained oligomers or macromolecules in each step,and hyperbranched polymers with high molecular weight were prepared.Compared with the divergent approach utilized in the synthesis of dendrimers,the pseudo-divergent approach is much simpler and more convenient,which might be useful in the large-scale fabrication of highly branched polymers.