Research on Polymer Modifiers of Bio-asphalt Synthesized by Controlled/Living Radical Polymerization

Abstract

Bio-asphalt is a new material compared with petroleum asphalt. The bio-asphalt is prepared by bio-oil, which is produced by fast pyrolysis of biomass. Disadvantages of bio-oil are instability and poor high and low temperature performance. Considering these shortcomings, a polymer modifier with controlled number-average molar mass and well-defined microstructure was prepared by controlled/living radical polymerization. In this research, the modifier was added in bio-asphalt to prove its performances which were evaluated by three major indexes tests of asphalt. Test result shows that the modified bioasphalt has good stability and good high and low temperature performance. In conclusion, the polymer modifiers, synthesized by controlled/living radical polymerization, have excellent modification effect on bio-asphalt.