Synthesis and characterization of novel thermo- and salt-sensitive amphoteric terpolymers based on acrylamide derivatives
Акриламид туындыларының негізінде алынған жаңа термо- және тұзға сезімтал амфотерлік терполимерлерді синтездеу және зерттеу
Синтез и исследование новых термо- и солечувствительных амфотерных терполимеров на основе производных акриламида
Ayazbayeva A.Y. Shakhvorostov A.V. Seilkhanov T.M. Aseyev V.O. Kudaibergenov S.E.
2021E.A.Buketov Karaganda State University Publish House
Bulletin of the Karaganda University Chemistry Series
2021#104Issue 49 - 20 pp.
A novel linear amphoteric terpolymers based on neutral monomer - N-isopropylacrylamide (NIPAM), ani-onic monomer - 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS), and cationic mono-mer - (3-acrylamidopropyl) trimethylammonium chloride (APTAC) were synthesized by free-radical polymerization in aqueous solution and characterized by methods of 1H NMR and FTIR spectroscopy, TGA, GPC, Dynamic light scattering (DLS) and zeta-potential. The thermal and salt sensitivity of amphoteric ter-nary polymers of various compositions, particularly, [NIPAM]:[AMPS]:[APTAC] = 90:2.5:7.5; 90:5:5; 90:7.5:2.5 mol.% were studied in aqueous and aqueous-salt solutions in the temperature range from 25 to 60 °C and at the NaCl ionic strength μ interval from 10-3 to 1M. It was found that due to hydropho-bic/hydrophilic balance, the temperature dependent conformational and phase change of macromolecular chains becomes sensitive to salt addition and allows the fine-tuning of the phase transition. In aqueous and aqueous-salt solutions, the average hydrodynamic size of amphoteric terpolymers is varied from 8 to 300 nm exhibiting bimodal distribution at room temperature. The number average (Mn) and weight average (Mw) mo-lecular weights, polydispersity index (PDI), and zeta-potentials of amphoteric terpolymers in aqueous solu-tions were determined.
Amphoteric terpolymers , Core-shell structure , Hydro-phobic/hydrophilic balance , Phase transition temperature , Salt sensitivity , Thermal response
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Satbayev University, Almaty, Kazakhstan
Institute of Polymer Materials and Technology, Almaty, Kazakhstan
Sh. Ualikhanov University, Kokshetau, Kazakhstan
University of Helsinki, Helsinki, Finland
Satbayev University
Institute of Polymer Materials and Technology
Sh. Ualikhanov University
University of Helsinki
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