KINETIC AND THERMODYNAMIC ANALYSIS OF NON-ISOTHERMAL DECOMPOSITION OF WEAKLY BASED ANION EXCHANGER
Thermal analysis of a weakly basic anion exchanger with amidine groups based on a copolymer of acrylonitrile with divinylbenzene was carried out. Two decomposition ranges were found: I (26.39–278.63°C) – dehydration and destruction of labile fragments (Ea ≈ 55 kJ/mol), II (278.63–600.89°C) – destruction of the polymer chain and functional groups (Ea ≈ 180 kJ/mol). Thermodynamic parameters were calculated. It was found that the material is stable up to 400°C and suitable for high temperature applications.
1. P.E. Tulupov, N.G. Polyanskii. Thermal Stability of Anion-exchange Resins. Russian Chemical Reviews, 1973, 42 (9), 754771.
2. Cornelia Luca et al. Trends in Weak Base Anion Exchangers Resins. Revue Roumaine de Chimie, 2009, 54(2), 107–117.
3. Danielle J. Chun et. al. Physical and Chemical Responses of Amidine-Containing Polymers in the Capture and Release of CO2. Macromolecules, 2024, 57, 23, 11177–11189.
4. Nichita I, Lupa L, Visa A, Dragan ES, Dinu MV, Popa A. Chemical Modification of Acrylonitrile-Divinylbenzene Polymer Supports with Aminophosphonate Groups and Their Antibacterial Activity Testing. Molecules. 2024, 29(24), 6054.
5. Violeta Neagu, I. Bunia. Acrylic weak base anion exchangers and their chemical stability in aggressive media. Polymer Degradation and Stability, 2004, 83 (1), 33-138.
6. Luiz Claudio de Santa Maria et.al. Chemical modification of cross-linked resin based on acrylonitrile for anchoring metal ions. Reactive & Functional Polymers 49 (2001) 133–143.
7. Каттаев Н.Т., Бабаев Т.М. Структура ионитов на основе сопоимеров акрилонитрила // Композиционные материалы. – Ташкент, 2013. – № 4. – С. 26-28.
8. Каттаев Н.Т. Изучение термостойкости новых ионитов на основе акрилонитрила // Universum: технические науки. – Россия, 2016. – № 10 (31).
Copyright (c) 2025 «ACTA NUUz»
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
.jpg)
1.png)
