Abstract
Polyaniline and polyaniline-mineral composites on the base of zeolite with low polymer content have been synthesized chemically methods. The formation of composites zeolite/polyaniline was confirmed by results of X-ray phase, FTIR spectral and thermogravimetric analysis. The comparative analysis spectral, thermal and electrical properties of the synthesized samples of polyaniline and composite zeolite/polyaniline has been carried out. It was shown that the structure of samples of polyaniline synthesized is amorphous. The structure of polyaniline in composites zeolite/polyaniline is also mainly crystalline-amorphous with the inclusion of crystalline particles of zeolite as matrices on which particles of polyaniline in the form of emeraldine salt of sulfate acid are formed. It was found that weak interphase interaction between macromolecule of polyaniline and particles of zeolite is possible thanks to interaction hydrogen bonds between surface hydroxy groups of zeolite and imino atoms of the macromolecular chains of polyaniline. The thermal stability of composites zeolite/polyaniline is much higher than pure polyaniline, due to the content of zeolite in the composite. It was established that the electrical conductivity of chanically synthesized samples of polyaniline and composites zeolite/polyaniline is several times higher than the electrical conductivity of chemically synthesized samples. The physico-chemical analysis of samples properties has been carried out using a Dron-5-04 diffractometer (Cu Kα radiation; l=1.54060 Å) in the reflection mode. Fourier-transform infrared (FTIR) spectrа of powders sample were recorded in the range of 4 000–650 cm –1 using a NICOLET IS 10 ATR spectrophotometer in the mode of reflection, which was later transformed into transmission mode. Thermal properties of synthesized samples has been analyzed using Q 1 500-D Derivatograph (MOM Paulik - Paulik - Erdei , Hungary) in the temperature range of 20–900 °C under a heating rate of 10 K/min in the atmosphere of air (corundum crucibles; standard – Al 2 O 3 ; weight of samples – 100 mg). The electrical conductivity of the pelleted samples was determined by measuring their resistance in the "sandwich" type cells at a temperature of 293±1 K using a Rigol DM 3 068 set of equipment for resistance measuring. Keywords: synthesis, polyaniline, zeolite, composite, structure, thermal stability, conductivity.
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