TY - JOUR A1 - Solomun, Tihomir A1 - Schimanski, A. A1 - Sturm, Heinz A1 - Illenberger, E. T1 - Efficient Formation of Difluoramino Functionalities by Direct Fluorination of Polyamides JF - Macromolecules N2 - Efficient formation of difluoramino (NF2) groups within the polymer matrix upon exposure of polyamides (PA6 and PA12) to elemental fluorine is reported. The reaction was assessed on bulk and thin-film samples by means of RA-FTIR (reflection–absorption FTIR), XPS (X-ray photoelectron spectroscopy), and NMR (nuclear magnetic resonance) techniques. Direct fluorination causes cleavage of the amide C–N bond and concomitant formation of the NF2 chain-end functionalities as evident from an exceptionally large shift (+5 eV) of the N 1s binding energy and an increase of the v(CO) frequency by about 80 cm-1. The structural model is supported by the 19F NMR spectra of volatile reaction products that clearly reveal the presence of the NF2 group. PY - 2005 DO - https://doi.org/10.1021/ma050067c SN - 0024-9297 SN - 1520-5835 VL - 38 IS - 10 SP - 4231 EP - 4236 PB - American Chemical Society CY - Washington, DC AN - OPUS4-22624 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -