2020 (1) 1

https://doi.org/10.15407/polymerj.42.01.003

Formation and characterization of silver-containing composites based on ionomeric poly(urethane-acrylate)s prepared via diffusion/sorption approach

A.L. Tolstov, Institute of Macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Кyiv, 02160, Ukraine, E-mail: a.tolstov@ukr.net ORCID: 0000-0001-6016-9308

V.F. Matyushov, Institute of Macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Кyiv, 02160, Ukraine ORCID: 0000-0002-0524-5862

E.V. Lebedev, Institute of Macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Кyiv, 02160, Ukraine ORCID: 0000-0002-5674-5306

D.A. Klimchuk, N.G. Kholodny Institute of Botany NAS of Ukraine, 2, Tereshchenkivska str., Kyiv, 01601, Ukraine ORCID: 0000-0002-7076-8213

Polym. J., 2020, 42, no. 1: 3-10.

Section: Structure and properties.

Language: English.

Abstract:

Silver containing composites were prepared via diffusion/sorption of silver ions into previously synthesized functionalized poly(urethane-acrylate) matrices. The peculiarities of coordination of Ag+ ions by carboxylate groups of the polymer chains followed by its reduction was observed by FTIR, UV-vis, SEM and lyophilicity measurements. Interactions between silver moieties and the functionalities of polymer matrices were identified by spectral studies. A high-temperature shift of relaxation transition temperature of PPO segments of silver-containing polymers in accordance with DMA studies is an additional evidence of coordination of different forms of silver (ions, clusters etc) by helix oligoether structures. The conditions of sorption process as well as chemical structure of the matrices and reactivity of Ag+ ions provide a transformation of ionic silver into reduced metal moieties and its immobilization within surface layer of polymer matrices as nano- and submicron size aggregates. Nanoparticulate silver even in aggregated form demonstrates a strong surface plasmonic resonance with a maximum position depends on functionality of the matrix (mainly near 400 and 500 nm).

Keywords: polyurethane, acrylics, ionomers, silver, composite, interaction, structure, properties.

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