Synthesis and physicochemical properties of new polymeric complexons based on fibre nitron

A.S. Blochina, I.А. Kamalov, L.V. Adamova

Ural Federal University named after the first President of Russia B.N.Yeltsin, Yekaterinburg

Interaction with water of polyelectrolytic hydrogels on the basis of polyacrylic and polymethacrylic acids is investigated. Static isothermal sorption of vapors of water is studied. Differences of chemical potentials of water ∆μ₁, polymers ∆μ₂, Gibbs's energy of swelling in ∆g^m water, parameters of interaction of Florey-Hagginsa χ₁ are calculated. It is shown that sorption ability of gels increases with growth of extent of ionization and is defined both the packing density, and affinity to water. Sharp concentration dependence of parameter χ₁ is found. It is shown that the coefficient of diffusion of water in gels increases in the beginning with growth of its contents, and at further dilution of system ceases to change.

Keywords: Keywords: acrylic acid, methacrylic acid, the degree of ionization, the Gibbs’ energy.

THE INFLUENCE OF SERVICE CONDITIONS ON PHYSICOMECHANICAL PROPERTIES OF RIGID POLYURETHANE

E.R. Volkova¹, V.V. Tereshatov¹, N.B. Kondrashova¹, P.A. Sitnikov<sup>2

1</sup>Russian Academy of Sciences, Institute of Technical Chemistry, Ural Branch, Perm ²Russian Academy of Sciences, Institute of Chemistry of Komi Repuplic, the Scientific Division, Ural Branch, Syktyvkar

The changing of physicomechanical properties of polyurethane materials based on the mix of hydroxyl oligomer and the polyisocyanate, operating in damp conditions, and the resistance of this polyurethane to climatic influences in the range of temperatures from –50 to +50 ⁰С are investigated.

Keywords: polyurethane materials, hydroxyl oligomers, polyisocyanate.