Preparation of reactive chain extension rejuvenators and its application in the aged SBS modified bitumen sustainable recycling

In order to better restore the properties of aged SBS modified bitumen (ASMB) and promote its sustainable recycling, in this paper, the reactive chain extension rejuvenators (RCERs) were prepared from polyethylene glycol (PEG-400/PEG-1000) and diisocyanate (2,4-toluylene diisocyanate (TDI)/hexamethylene diisocyanate (HDI)) and the effect of RCERs on the rejuvenation of aged SBS was studied. Different rejuvenation systems composed by TDI, HDI,...