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前曾报导9-氨基壬酸的缩聚,从开始到反应程度p增加到99％左右时止,均遵循二级反应。在这以后,由于体系粘稠的影响,迅速转为三级反应。本文报导在6-氨基己酸和11-氨基十一酸缩聚时,也出现同样现象,即在p逐渐到高于99％左右时,反应从二级转变为三级。可以说这一现象是AB型单体聚酰胺化的一般规律,从而澄清了文献中对这一问题的不同论点。
A previous report of 9-aminononanoic acid polycondensation, from the beginning to the reaction rate p increased to about 99% only, are to follow the secondary reaction. After that, due to the impact of the system viscosity, quickly converted to three-level reaction. The same phenomenon reported in the polycondensation of 6-aminocaproic acid and 11-aminoundecanoic acid is reported in this paper. That is, when p is gradually higher than about 99%, the reaction changes from the second stage to the third stage. It can be said that this phenomenon is the general law of polyamidation of AB type monomer, thus clarifying the different arguments in the literature on this issue.