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Hybrid materials of poly(ethylene oxide-co-epichlorhydrin), HYDRIN, and silica were prepared by a sol-gel process. An inorganic network was grown in a tetrahydrofuran/organic polymer solution from acid hydrolysis and polycondensation of tetraethoxysilane, TEOS. During solvent evaporation and simultaneous growth of the inorganic network, phase separation was observed. The mechanism of phase separation...
NAFION /silicon oxide hybrids were prepared from solution by hydrolysis/polycondensation of alkoxy silanes. Transparent, but brittle films were obtained when TEOS was used as the inorganic polymer precursor, showing a lamellar structure by transmission electron microscopy. Part of the TEOS was substituted by TMDES to increase the film flexibility. For substitution higher than 10% phase separation...
Semi-interpenetrating networks (semi-IPN) of polypyrrole and ethylene-propylene-5-ethylidene-2-norbornene rubber, EPDM, were prepared by chemical oxidation of the monomer using two different methods of synthesis. In the first method, EPDM rubber samples containing CuCl 2 (powder with granulometry < 105 μm) and dicumyl peroxide were obtained by mechanical mixing, crosslinked by heating and...
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