Study on Thermal Oxidation of Asphalt Fractions by In Situ FTIR Analysis
Base asphalt can be separated into four fractions, which are saturates, naphetene aromatics, polar-aromatics and asphaltenes. The thermal oxidation process of each fraction was studied by in-situ Fourier transform infrared (FTIR) analysis in different atmospheres in this paper. And the results show that each fraction in nitrogen atmosphere has no obvious aging phenomenon, while in oxygen and air atmosphere, only saturates and naphetene aromatics have a drastic change because of thermal oxidation, and polar-aromatics and asphaltenes almost keep unchanged. When adding 2.5% antioxidant 300 or 5% SBS respectively to saturates and naphthene aromatics, it can be found from the results that the degree of thermal oxidation of these two components decrease.
Guojun Zhang and Jessica Xu
X. J. Cao et al., "Study on Thermal Oxidation of Asphalt Fractions by In Situ FTIR Analysis", Advanced Materials Research, Vols. 160-162, pp. 330-335, 2011