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9-氨基壬酸在恒沸的惰性介质中进行缩聚反应,生成的水,立即被介质蒸汽带走,用此法,缩聚反应极快.在十五分钟内,反应程度p,即已达到95％以上,三小时后,P可达99％以上,分子量M_n可达40000,这些都是前人没有做到的。 由于P可达99％以上,此法有可能研究缩聚反应的全过程。发现9-氨基壬酸的缩聚,从开始到p=99％,遵循二级反应。此后由于体系过分粘稠,反应速度随分子量增高即端基减少而变慢,反应转变为三级。
Amino-nonanoic acid polycondensation reaction in a constant inert inert medium, the resulting water, immediately by the media steam away, with this method, the polycondensation reaction very fast in fifteen minutes, the degree of reaction p, which has reached 95 %, After three hours, P up to 99% or more, molecular weight M_n up to 40,000, these are the predecessors did not do. As P up to 99% or more, this method may study the whole process of polycondensation reaction. Polycondensation of 9-aminononanoic acid was found starting from p = 99% followed by a secondary reaction. Since then the system is too viscous, the reaction rate increases with the increase of the molecular weight of the terminal group to slow down, the reaction into three.