Abstract
Nanocomposite of poly[tetrafluoroethylene-co-perfluoroethylvinylethel] (abbrev. PFA) / long-chain quaternary phosphonium modified clay (C16-P-MMT) have been prepared by melt-compounding process using fluorinated crystalline polymer and C16-P-MMT. The structures of polymer and dispersed C16-P-MMT in matrix were investigated by using Wide angle X-ray diffraction (WAXD). The crystallization temperature was determined using a Differential Scanning Calorimetry (DSC). From WAXD profiles, it was found that C16-P-MMT were almost uniformly dispersed in matrix, while the characteristic diffraction profiles of C16-P-MMT are not shown in WAXD profiles of nanocomposite. Further, the intensity of most characteristic diffraction profile of PFA is increased for the composite sample as compared with that of the neat PFA. And also the crystallite size of the PFA is increased. These results suggest that degree of crystallinity are increased for the composite sample as compared with that of the neat PFA. In addition, a crystalline peak these nanocomposites showed in DSC thermograms (first cooling) was shifted to higher temperature side than of neat PFA. It is suggested that the origin of this thermal behavior corresponds to occurrence the nucleator effect of C16-P-MMT to the matrix PFA. Further, transparent PFA / C16-P-MMT nanocomposite film was constructed by drawn.
