Films of poly[bis(trifluoroethoxy)phosphazene], [NP(OCH2CF3)]n, underwent surface reactions when treated with solutions of sodium alkoxides such as Na+−(OCH2CH2)xOH, where x = 1, 2, or 4; Na+−(OCH2CH2)xNH2, where x = 1 or 2; and Na+−OCH2CH2CN. The nucleophiles replaced trifluoroethoxy groups at the polymer surface without detectable side reactions. The modified surfaces were more hydrophilic than the starting material. The presence of the new surface groups was confirmed by contact-angle measurements, SEM, XPS, TEM, and ATR-IR methods. The accessibility of the surface hydroxyl and amino groups to further functionalization was confirmed by the reaction of these groups with phenyl isocyanate.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Chemistry