Polyacrylate Thermoplastic Elastomer Replacing SBS for Modified Asphalt

Abstract

Poly (styrene-butadiene-styrene) block copolymer (SBS) is the most common thermoplastic elastomer (TPE) used for modified asphalt. The unsaturated double bond of its polybutadiene block is prone to crosslinking and aging, which affects the performance and service life of modified asphalt. To solve this problem, acrylate soft monomers are used to replace butadiene, and hard monomers with high glass transition temperature (T g ) are used to replace styrene. Such new TPEs are designed to improve the chemical stability of the soft segment and improve the modification high and low temperature properties of asphalt. Firstly, the monomers used for flexible block and rigid block are screened out based on monomer price and T g , and the polymerization method of each monomer is analyzed. Then, the polymerization