Compatibility between SBS and Asphalt

The compatibility between SBS and asphalt was studied by molecule simulation and asphalt's basic capability testing. The results indicated that SBS and asphalt had different compatibility in the different SBS added amounts at different temperatures. Some compositions of the asphalt could enter an assembled polybutadiene segment. The effects of this phenomenon enhanced the Glass transition temperature. With high shear force effect, some compositions of the asphalt also could enter a polystyrene segment, which decreased the Glass transition temperature, but did not seriously disjoin the physical cross-linking point. When the mass fraction of SBS was 4%, SBS presented disperse spherical grain. However, when the mass fraction of SBS was over 8%, it formed a continuous phase. With the increasing mass fraction of SBS, the softening point and low temperature ductility would increase, and penetration and high temperature storage stability would decline.