Bulletin of
Vitebsk State
Technological
University
ISSN: 2306-1774 (Online)
ISSN: 2079-7958 (Print)
раб. тел. +375 212 495338
ISSN: 2306-1774 (Online)
ISSN: 2079-7958 (Print)
раб. тел. +375 212 495338
UDC 546.47:66.081.3
DOI: https://doi.org/10.24412/2079-7958-2025-4-76-86
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AbstractTo develop a method for imparting insolubility to ionogenic copolymers of acrylonitrile (AN) and 2-acrylamide- 2-methylpropanesulfonic acid (AMPS) (with the latter content of 20, 25, and 30 % (wt)) they were subjected to heat treatment for various periods of time at 100 °C, 140 °C, 160 °C, and 200 °C. The effectiveness of this modification was assessed by studying the solubility of test samples in dimethylformamide, as a result of which heat treatment conditions were determined that achieved a reduction in the degree of swelling up to the loss of solubility of ionogenic copolymers based on AN and AMPS. The static exchange capacity (SEC) of the original and heat-treated poly[AN–co–AMPS] ion-exchange resins was determined for sodium ion sorption. Additionally, their sorption capacity for zinc and nickel ions was measured. It was found that modification of the studied ion exchangers by heat treatment at 100 and 200 °C leads to an increase in their SEC. However, the sorption properties of the ion exchangers change ambiguously. Thus, in almost all cases, the amount of sorbed zinc ions exceeds the SEC values. With respect to nickel ions, all heat-treated ion exchanger samples exhibit virtually identical sorption activity (1.00±0.15 mmol-eq/g). However, the amount of sorbed Ni2+ ions is 2–4 times lower than the SEC values. |
Chykunskaya, Vera M. The effect of temperature and time exposure on the properties of acrylonitrileand
2-acrylamide-2-methylpropanesulfonic acid-based ion exchangers / Vera M. Chykunskaya, Valery A. Ogorodnikov, Leonid A. Shcherbina, Iryna A. Budkute // Bulletin of Vitebsk State Technological University . ─ 2025. ─ № 4(54). ─ P. 76. DOI:10.24412/2079-7958-2025-4-76-86.