Dynamic and structural insights into hydrogen-bonded interpolymer complexes of poly(2-alkyl-2-oxazolines) with poly(carboxylic acids)
Smyslov R.Y. Gorshkova Y.E. Nekrasova T.N. Makhayeva D.N. Mun G.A. Irmukhametova G.S. Khutoryanskiy V.V.
December 2025Academic Press Inc.
Journal of Colloid and Interface Science
2025#699
The formation of interpolymer complexes (IPCs) between poly(2-alkyl-2-oxazolines) (PAOx) and poly(methacrylic acid) (PMAA) in solutions has been investigated using polarized luminescence relaxation and small-angle X-ray scattering (SAXS) structural methods. The results reveal that hydrophobic interactions contribute to the formation of IPCs in both aqueous and methanol solutions, influenced by the length of the side group in PAOx. The relaxation times, which can be used to quantify the intramolecular mobility of the luminescently labeled poly(methacrylic acid) (PMAA*), increase from 80 to 680 ns, indicating the formation of IPCs between PMAA* and PAOx. SAXS analysis of aqueous IPC solutions unveils their supramolecular organization, which is similar to that of nanohydrogels, with the hierarchical level comprising compact structures ranging from 4 to 10.7 nm in size.
H-bonds , Interpolymer complexes , Nanosecond dynamics , Polarized luminescence , SAXS , Water soluble polymers
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Institute of Macromolecular Compounds—Branch of B.P. Konstantinov Petersburg Institute of Nuclear Physics—NRC “Kurchatov Institute”, Saint-Petersburg, Russian Federation
Joint Institute for Nuclear Research, Dubna, Russian Federation
Institute of Physics, Kazan Federal University, Kazan, Russian Federation
Faculty of Chemistry and Chemical Technology, al-Farabi, Kazakh National University, Almaty, 050040, Kazakhstan
Reading School of Pharmacy, University of Reading, Whiteknights, PO Box 224, Reading, United Kingdom
Institute of Macromolecular Compounds—Branch of B.P. Konstantinov Petersburg Institute of Nuclear Physics—NRC “Kurchatov Institute”
Joint Institute for Nuclear Research
Institute of Physics
Faculty of Chemistry and Chemical Technology
Reading School of Pharmacy
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