Wide-angle X-ray diffraction (WAXD) and atomic force microscopy (AFM) were used to study the crystallographic structure of poly-(2-fluorophenylene-2-fluoroterephthalamide)f ibres. The unit cell parameters were obtained in WAXD measurements, and AFM yielded complementary information about the conformation of the fluorine-substituted phenylene rings. Results are compared with predicted crystal structures of poly(p-phenyleneterephthalamide) fibres, which were obtained by computer simulation experiments
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Characterization of fibres from poly-(2-fluorophenylene-2-fluoroterephthalamide) by a combination of WAXD .and AFM studies / B. H. Glomm, M. C. Grob, P. Neuenschwander and U. W. Suter // Polymer. – 1994. – Vol 35. – P. 878-881.