Polystyrene Pyrolysis in Oil Residues: Major Regularities and Influence on the Characteristics of Bitumen Materials
E. I. ANDREIKOV, YU. A. DIKOVINKINA, O. V. KRASNIKOVA, M. G. PERVOVA
Postovsky Institute of Organic Synthesis, UB RAS, Ekaterinburg, Russia
Keywords: битум, полистирол, пиролиз, перенос водорода, модифицирование, bitumen, polystyrene, pyrolysis, hydrogen transfer, modification
Pages: 361-366
Abstract
Polystyrene pyrolysis in oil residue was studied within temperature range 360-380 °C at atmospheric pressure. The composition of liquid pyrolysis products was determined by means of gas chromatography - mass spectrometry. The residue from the joint pyrolysis of modified bitumen was studied by means of PMR and FTIR spectroscopy; softening temperature, penetration and pyrobitumen content were determined. It was established that the major products of polystyrene pyrolysis in bitumen are saturated compounds, ethyl benzene, cumene, toluene, and 1,3-diphenylpropane, which are formed as a result of hydrogen transfer from bitumen components to the products of thermal degradation of polystyrene. The maximal rate of polystyrene destruction in bitumen shifts to the region of elevated temperature. Bitumen modification proceeds mainly due to the reactions involving the condensation of its components, initiated by hydrogen transfer. The effect of residual polystyrene on bitumen characteristics is much weaker.
DOI: 10.15372/CSD20180402
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