抄録
Surface molecular aggregation structure of poly(fluoroalkyl acrylate)s [PFA-Cy, where y is the fluoromethylene number of the fluoroalkyl (Rr) group] thin films was characterized by grazing-incidence X-ray diffraction (GIXD). In-plane diffractions corresponding to the hexagonal packing of the Rr groups and out-of-plane diffractions corresponding to the lamellar structures were measured for the PFA-Cy with y 2 larger than 8 in the surface and bulk regions. This result indicated that the Rf groups were oriented almost perpendicular to the surface and that the lamellar structures of Rf groups were oriented parallel to the surface. Also, a comparison of the GIXD data for original and annealed PFA-C8 films was carried out. It was revealed that the orientation of Rf groups and regularity of Rf lamellar crystal were improved by annealing treatment. In addition, a comparison of the GIXD profiles between the surface and bulk region was also carried out. It was suggested that the orientation and order of the Rf groups in the surface and bulk region are almost the same.
