On the Composites Based on Epoxy Resin - Progress in Organic and Physical Chemistry: Structures and Mechanisms - page 181

¿ ller has more strong interactions (thanks to modi¿ er) with epoxy polymer molecules,
than unmodi¿ ed ¿ ller.
The ampli¿ ed competition of the ¿ ller particles with macromolecules by TEOS
displays well also on the characteristics of water absorption. In general loosening of
microstructure because of micro empty areas is due to the increasing of ¿ ller content.
Formation of such defects in the microstructure of composite promotes the water ab-
sorption processes. Water absorption of composites with modi¿ ed diatomite is lower
than that for one with unmodi¿ ed ¿ ller to some extent. The decreasing of water ab-
sorption of composites containing silane compound is result of hydrophobic properties
of ones.
Composites with binary ¿ llers possess so called synergistic effect non-additive
increasing of technical characteristics of composites at containing of ¿ llers with de¿ -
nite ratio of them, which is due to creation of the dens distribution of ingredients in
composites.

15.4 CONCLUSION
Comparison of the density, ultimate strength, softening temperature, and water ab-
sorption for polymer composites based on epoxy resin and unmodified and modified
by tetraethoxysilane mineral fillers diatomite and andesite leads to conclusion that
modify agent stipulates the formation of heterogeneous structures with higher compat-
ibility of ingredients and consequently to enhancing of noted technical characteristics.

KEYWORDS

• Diatomite

• Epoxy resin

• Homopolymer

• Silanization

• Tetraethyl orthosilicate

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