2017 (1) 5

https://doi.org/10.15407/polymerj.39.01.39

The structure and thermomechanical properties of polyelectrolyte complexes based on carboxymethylcellulose and polyethyleneimine

V.L. Demchenko, V.I. Shtompel’, L.A. Goncharenko

Institute of Macromolecular Chemistry, NAS of Ukraine

48, Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2017, 39, No. 1: 39-43.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The polyelectrolyte complexes (PEC) from oppositely charged polyelectrolytes – sodium salt of carboxymethyl cellulose and polyethyleneimine hydrochloride at various molar ratios were obtained. The structural organization and thermomechanical properties of the prepared PEC were investigated by means of wide-angle X-ray scattering and thermomechanical analysis. A positive deviation of the experimental values of the glass transition temperature from the calculated ones, according to an additive principle, was revealed for the investigated PEC, which is a proof of the PEC formation. It is shown that the concentration dependence of the attains the maximum value for the stoichiometric composition of the PEC. The structure and thermomechanical behavior of the obtained polyelectrolyte complexes of different compositions vary from those of the initial polyelectrolytes. This effect was explained by the formation of interpolymeric ionic groups and cooperative electrostatic interaction between the anionic and cationic polyelectrolyte.

Key words: carboxymethylcellulose, polyethyleneimine, polyelectrolyte complexes, structure, thermomechanical properties.

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