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- W2007543511 abstract "Based on triethoxy(3-(1,1,1,2,5,5,5-hepatfluoro3 - (perfluoropropan-2-yl) - 4-(trifluoromethyl)pent-3-en-2-yl) oxy)propylsilane, obtained from the commercially available trimer hexafluoropropylene, branched oligosiloxanes were synthesized by hydrolytic polycondensation in the active medium . The resulting polymers were studied by NMR and IR spectroscopy, and their molecular mass characteristics were investigated by GPC. In order to create stable hydrophobic coatings, the dependence of the hydrophobic properties of the resulting coatings on the surface of glass and aluminum on the conditions of polymer synthesis was studied. It has been shown that changes in the nature of the active medium (acetic or trifluoroacetic acid), the synthesis temperature, and the ratio of monomers:the active medium results in a polymer with similar molecular weights. For polymer coatings with the highest molecular weight Mw = 21.6 × 103, the average values of contact angles on glass and aluminum were 113 and 114°, respectively. In addition, condensation of the triethoxyl derivative of the hexafluoropropylene trimer with phenyltrimethoxysilane produced a modifier for hydrophobizing the surface of epoxy resins. When mixed into an epoxy resin up to 1.5% by weight of the resulting copolymer, resins with a contact angle of up to 113° were obtained." @default.
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- W2007543511 date "1977-10-01" @default.
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- W2007543511 title "Hexafluoropropene trimer. Synthesis and properties of functional derivatives" @default.
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- W2007543511 doi "https://doi.org/10.1016/s0022-1139(00)83107-3" @default.
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