2008 年 33 巻 1 号 p. 137-140
Fine structure in the matrix polymer and dispersion state of fillers for poly [tetrafluoroethylene-co-(perfluoroalkylvinylether)] (abbrev. PFA) I nano-fillers (such as organo-modified smectite, organo-modified mica, and porous silica particles) composites were investigated by wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and differential scanning calorimetry (DSC). From the results of TEM observation, it was found that nano-fillers were almost uniformly dispersed in PF A matrix. Further, PFA I nano-filler composites are exhibited relatively larger distance between lamellar gravity at least 30 nm estimated by SAXS than general hydrogenated crystalline polymer. This result means that fluorinated copolymer formed the thicker lamella crystal. In addition, a melting peak these nanocomposites showed in DSC thermograms was shifted to higher temperature side than that of neat PF A. It is suggested that the origin of this thermal behavior corresponds to occurrence the nucleator effect of nano-fillers to the matrix PFA.
