Home – Home – Jornals – Chemistry for Sustainable Development 2019 number 2

The rheological properties of a two-component aqueous solution of polyvinyl alcohol (PVA), as well as emulsions consisting of water, PVA and hydrophobic filler, have been studied. The dispersed phase of the emulsions was transformer oil (TO) or polymeric petroleum resin (PPR), and the dispersion medium was an aqueous solution of PVA. To increase the adhesion of the PPR to the soil particles, the resin was pre-oxidized with hydrogen peroxide H₂O₂ to produce an oxidized polymeric petroleum resin (OPPR). After the freezing/thawing cycle, cryogels were formed from liquid systems and their mechanical, thermal, and physicochemical properties were studied. It has been established that cryogels containing TO have more elastic properties as compared with two-component cryostructured systems (PVA - water), but have less elasticity than cryogels containing PPR. The latter are also characterized by better thermal insulation properties compared to two-component cryogels. A particular feature of cryogels filled with OPPR is their hydrophobicity. It was revealed that after the soil was impregnated by a polymer emulsion with OPPR and a cryogel was formed subsequently after a freezing/thawing cycle, a water-proof shield was formed. Materials based on cryogels with hydrophobic properties, filled with OPPR, are promising and can be recommended for practical use in the oil and construction industry.