STUDY OF THE DIRECTION OF THE POLYCONDENSATION OF ADIPIC ACID WITH DIETHYLENETRIAMINE

UDC 547.461.6:544.7

  • Borkina Yana Valer’evna – PhD student, the Department of Chemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: yanaborkina@mail.ru

  • Fleisher Vyacheslav Leonidovich – PhD (Engineering), Associate Professor, Head of the Department of Chemical Processing of Wood. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: v_fleisher@list.ru

DOI: https://doi.org/10.52065/2520-2669-2021-247-2-48-52

Key words: polycondensation in a melt, diethylenetriamine, adipic acid, aminogroup content, IR-spectroscopy, polyaminoamides.

For citation: Borkina Ya. V., Fleisher V. L. Study of the direction of the polycondensation of adipic acid with diethylenetriamine. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2021, no. 2 (247), pp. 48−52 (In Russian). DOI: https://doi.org/10.52065/2520-2669-2021-247-2-48-52.

Abstract

Polyaminoamides formed in the process of polycondensation of adipic acid with diethylenetriamine are widely used in the manufacture of moisture-resistant resins for cellulose-containing composite materials, while their further modification is possible due to the presence of secondary aminogroups in their structure.

It this paper, we study the interation of eguimolar amounts of diethylenetriamine and adipic acid in the melt at different temperatures: 160, 170 and 180°C. The changes in the quantitave and qualitative composition of the aminogroups (in relation to the composition of the aminogroups of the initial mixture) during the polycondensation of adipic acid with diethylenetriamine were studied It is established that when the process is carried out at a temperature of 180°C, the coex system the reaction rate is hinger compared to processes carried out at lower temperatures (160 and 170°C), as evidenced by a decrease in the total number of aminogroups in the mixture by 34.94%, with 58.33% primary aminogroups reacting . The number of secondary aminogroups in the mixture decreases slightly regardless of the reaction temperature, while during the polycondensation of adipic acid with diethylenetriamine, part of the amine is lost due to its volatility. The structure of obtained products was studied by the method of IR-spectroscopy. It is established that during the process of polycondenstion of adipic acid whit diethylenetriamine under the above conditions what corresponding fully aminoamides of a linear structure.

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