2014 (3) 4

Influence modified isocyanates on thermophysical characteristics of organic-inorganic compositions

 V.L. Budzinska, V.V. Davidenko, A.A. Brovko, E.V. Lebedev

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2014, 36, no. 3: 251-256.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The thermophysical researches of organic-inorganic composites on the basis of modified polyisocyanates and sodium of silicate are investigated. It is established, that introduction modified oligourethane leads to reduction, both vitrification temperature samples, and temperature of the beginning of decomposition of samples that is caused by presence flexible chain oligoether the block as a part of modified isocyanates, and also different molecular weight oligourethanes. The qualitative analysis of temperature dependences of viscoelastic functions of the created composites is carried out. It is revealed, that introduction modified isocyanates in composite structure leads to formation of single-phase system.         

Key words: organic-inorganic composites, segmented oligourethanes, glass-transition temperature, modulus of elasticity, modulus of dynamic loss.