【摘要】 由3,5-二硝基苯甲酰氯和邻氨基苯甲酸合成了AB2型单体2-(3,5-二氨基苯甲酰氨基)苯甲酸。该单体进行自缩聚反应,合成了新型超支化聚酰胺(a),将其与酰氯反应,得到了7种封端的超支化聚合物(b~h)。用FT-IR1、H NMR、GPC、DSC测试技术对超支化聚合物进行了表征。封端改性后,聚酰胺的溶解性均得到了提高,聚合物的重均分子量(Mw)为3.36~3.96 kg/mol,特性粘度(ηinh)为0.061~0.078 dL/g,聚合物玻璃化转变温度(Tg)为56~185℃,随封端剂脂肪链增长而降低,随封端剂极性增加而升高。更多还原

【Abstract】 A new AB₂monomer,2-（3,5-diaminobenzamido）benzoic acid,was synthesized from 3,5-dinitrobenzoyl chloride and o-aminobenzoic acid.A hyperbranched aromatic polyamide（a） was prepared from this new monomer by self-polycondensation,and seven hyperbranched polymers（b～h） with various end-groups were also prepared by end-capping reactions with acid chlorides.These polymers were characterized by（FT-IR）,¹H NMR,GPC and DSC.Through the modification of the end-groups,the solubilities of the polymers synthesized were improved. The M_w′s of polymers b～h were between（3.36 kg/mol） and（3.96 kg/mol）,the η_inh′s of polymers a～h were between 0.061 dL/g and 0.078 dL/g,and the T_gs were between 56 ℃ and（185 ℃）.The longer the aliphatic chain of the capping agent,the lower the T_g of the polymer;the higher the（polarity） of the capping agent,the higher the T_g of the polymer.更多还原