Abstract
This paper describes different procedures applied for the preparation of stabilized fibers from Avgamasya asphaltite products. Three different methods of solvent extraction, vacuum distillation of fluidized bed pyrolysis tar, and air blowing of the vacuum distilled products were used in this study. The asphaltite pitches obtained by different methods are characterized by various techniques such as elemental analysis, thermogravimetric analysis (TGA and DTG), softening point (SP), Fourier transform infrared spectroscopy (FT-IR), and solution 1H and 13C nuclear magnetic resonance (NMR) spectroscopy. Structural characterization by elemental analysis, FT-IR, and nuclear magnetic resonance spectroscopy on both vacuum-distilled and air-blown pitches showed that distillation of lighter fractions, reduction of atomic H/C ratio, and dehydrogenation raised their softening points. Structural analysis by NMR showed that asphaltite pitches consist of condensed aromatic rings combined with methylene bridges and heteroc...
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