Water sorbtion by epoxy-based nanocomposites with carbon nanotubes in glassy and rubber states of polymer matrix

Khaskov M.A.
UDC
544.723:678
DOI
10.18577/2307-6046-2016-0-6-7-7
Article PDF (Russian) (608.81 KB)
How to cite
Khaskov M.A. Water sorbtion by epoxy-based nanocomposites with carbon nanotubes in glassy and rubber states of polymer matrix // Proceedings of VIAM. 2016. No. 6. DOI: 10.18577/2307-6046-2016-0-6-7-7. URL: https://test.viam.ru/en/journal/2016/6/7
Keywords
polymers, nanocomposites, carbon nanotubes, glass transition temperature, water sorption, hydrothermal aging.
Abstract

The sorption of water by epoxy-based nanocomposites with carbon nanotubes in glassy and rubber states of polymer matrix was studied. It was shown, that at sorption of water by polymer matrix in glassy state the addition of carbon nanotubes causes decreasing of both the average diffusion coefficient and water uptake. The hydrothermal aging above the glass transition temperature (Tg) of polymer matrix results in inverse correlation. It is suggested, that the lower water sorption below Tg originates from reduced cure degree of polymer matrix and enhanced rate of structural relaxation of nano-modified polymer causing «mobility freezing» of polymer chains and, as a result, decreasing of water diffusion coefficient in polymer matrix. Enhanced water sorption by nano-modified composite above Tg, originates, probably, from a bigger fraction of free volume in polymer matrix. Work is executed within implementation of the complex scientific directions 13.1. «Binding for polymeric and composite

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