The study of char residues after thermal degradation of synthetic polymers, especially the identification of their morphology, structure and chemical composition is presented in this paper. Special attention was focused on the polystyrene, PVC and polyamide char residues. By means of microscopy in reflected light and reflected polarized light the manifestations of optical anisotropy were observed. X-ray analysis was used for the examination of the microstructure of PVC char residues carbonized at temperatures above 1000 "C. For PVC char residues the ekectric resistivity was determined. The results have proved the close connection between the structure and properties of char residues and the intensity and course of thermal degradation of polymers.halogen, etc. are present. Under dehydration or dehydrochloration processes the polymer begins to
Mining University (VSB), 708 33 Ostrava, Czechoslovakia Structural residues of the original polymer remain in the char portion of degraded polymer depending on the temperature and duration of the thermal degradation and the temperature. Elementary analysis and infrared spectroscopy have been used for the identification of char residues.
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