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Determining Conformations and Sizes of Polyethylene Glycol Macromolecules in Water–Polyethylene Glycol–LiOH Systems by the Viscometry Method

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Abstract

The kinematical viscosity of water-polyethylene glycol-LiOH systems is studied at 293.15 K for the LiOH molar fraction of 0–0.05 and the PEG concentration of 0–5 g/length. Polyethylene glycol fractions of different molecular masses (1000, 1500, 3000, 4000, and 6000) are considered. Experimental data on the kinematic viscosity for a given LiOH concentration are used to calculate the following quantities: intrinsic viscosity of studied solutions, Huggins coefficient, parameter α in the Mark-Houwink equation, swelling coefficient of polyethylene glycol macromolecules, intrinsic viscosity in the θ solvent, mean square distance of the PEG macromolecular chain in the solution and in the θ solvent, length of the Kuhn segment in the solution and the θ solvent. It is shown that macromolecular polyethylene glycol coils are permeable for the surrounding liquid (water-LiOH) and that their volumes decrease and the macromolecule flexibility increases with increasing LiOH concentration.

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Authors and Affiliations

  1. Baku State University, Baku, Republic of Azerbaijan

    E. A. Masimov, B. G. Pashyaev & M. R. Rajabov

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  1. E. A. Masimov
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  2. B. G. Pashyaev
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  3. M. R. Rajabov
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Correspondence to B. G. Pashyaev.

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Russian Text © The Author(s), 2020, published in Zhurnal Strukturnoi Khimii, 2020, Vol. 61, No. 6, pp. 932–939.

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Masimov, E.A., Pashyaev, B.G. & Rajabov, M.R. Determining Conformations and Sizes of Polyethylene Glycol Macromolecules in Water–Polyethylene Glycol–LiOH Systems by the Viscometry Method. J Struct Chem 61, 880–886 (2020). https://doi.org/10.1134/S0022476620060062

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  • DOI: https://doi.org/10.1134/S0022476620060062

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