2019 (1) 4

https://doi.org/10.15407/polymerj.41.01.034

Structural peculiarity and termomechanical properties of polyelectrolyte complexes and metal-containing nanocomposites based on functionalized starch and polyethyleneimine

V.I. Shtompel, V.L. Demchenko, S.I. Sinelnikov, O.A. Radchenko, S.V. Riabov

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shose, Kyiv. 02160, Ukraine

Polym. J., 2019, 41, no. 1: 34-40

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The structural organization and thermomechanical properties of two types of stoichiometric polyelectrolyte complexes (PEC) using IR spectroscopy, X-ray diffraction and thermomechanical analysis were investigated. On of them was prepared from carboxymethyl starch CMS (degree of substitution (DS) is 1) and 2-hydroxypropyl-3-trimethylamine starch (DS = 0,8), another PEC was formed from CMS and polyethyleneimine (PEI). It is shown that the structure of PEC obtained from starch derivatives containing carboxy and tertiary amino groups is amorphous-crystalline, whereas the structure of PEC obtained from CMS and PEI is amorphous. In order to obtain metal-containing nanocomposites the chemical (NaBH4) and thermochemical reduction (150 °С) of appropriate tetriary silver and copper complexes with PEC are used. The peaks at 2qm = 38,0, 43,8 and 38,7, 46,0° which observed in XRD of the obtained nanocomposites correspond to the (111) and (200) planes of Ag, for nanocomposites obtained by chemical and thermochemical reduction, respectively. In XRD of copper-containing nanocomposites prepared by chemical reduction, the peaks at 2qm = 35,6° and 41,0° correspond to the (111) and (200) planes of Cu2O.

Keywords: maize starch, polyethyleneimine, polyelectrolyte complexes, metal-containing nanocomposite, nanoparticles.

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