2015 (2) 10

https://doi.org/10.15407/polymerj.37.02.174

The influence of the phenalenone dyes on the kinetics of the polyurethanes formation with different nature of the diisocyanate unit

L.F. Kosyanchuk, M.S. Stratilat, N.V. Kozak, T.T. Todosiichuk

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2015, 37, no. 2: 174-178.

Section: Synthesis polymers.

Language: Russian.

Abstract:

The influence of phenalenone dyes containing different functional groups on the kinetics of polyurethane matrices formation was studied. The polyurethanes differ in nature of diisocyanate components (aromatic and aliphatic). It was shown that their introduction mainly leads to slower the reaction of urethane formation. The observed changes are due to: the spatial structure of the dye molecules, their ability to chemical bonding with formed polyurethane; in the case of an aromatic diisocyanate component with the nature of p–p– interaction between its aromatic rings and dye fused rings. Dyes substituents, which are not located in the plane of a condensed ring, cause large steric hindrance, which slows the reaction of urethane formation. The chemical bonding of the dye molecules with a polyurethane matrix differently affect the reaction.

Keywords: polyurethane, phenalenone dyes, the reaction rate constant, electron spectroscopy.

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