Abstract
327 Polycondensation of amino acids is the subject of a multitude of studies. Compounds of this class are important both for chemical engineering, e.g., production of polyamides, and for chemical science, in particular, for biochemistry. In this study, L -aspartic acid (ASP) was chosen. Its polycondensation has been studied in detail [1]. However, the main body of relevant studies is limited to considering various polycondensation methods and the effect of reaction conditions on the composition and properties of reaction products [2]. The conclusions about the reaction mechanism are drawn from the results of such studies. Kinetics, which is an important tool for establishing the mechanism of complex processes, is modestly represented. Only rather recently did measurements of ASP weight loss during dynamic thermogravimetric analysis (TGA) [3] show two peaks in the weight loss vs. temperature curve obtained by differentiation. It was suggested that this is a consequence of the two-step character of the process: first, polyaspartic acid is formed, and then it is dehydrated to give polysuccinimide (PSI).
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