Structure and percolative properties of composites based on polyvinyliden fluoride and doped polyaniline.

Structure and percolative properties of composites based on polyvinyliden fluoride (PVDF) and its mixtures with polyaniline (PANI), doped with p-toluenesulfonic acid (TSA) was investigated by the methods of X-ray analysis, differential scanning calorimetry and impedance spectroscopy. It was shown, that descriptions of such compositions substantially depend on content of PANI-TSA and on the method of their preparation. It was established, that systems PVDF-PANI-TSA show a percolation behavior with low percolation threshold Cc H" 4%. The decrease of the crystallinity of PVDF-PANI-TSA systems specifies the mobility decrease of polymer chains of PVDF in the boundary layer around particles PANI-TSA. The investigated system is incompatible, that results in a segregation PANI-TSA in a separate phase. [ABSTRACT FROM AUTHOR]