SBR is produced by copolymerization of butadiene and styrene. It is the most widely produced general-purpose synthetic rubber. There are emulsion polystyrene butadiene rubber, solution polymerized styrene butadiene rubber and thermoplastic rubber (SBS).

The aging test of rubber products belongs to the category of aging test. Rubber aging refers to the phenomenon that the performance and structure of rubber and products are changed due to the comprehensive action of internal and external factors during processing, storage and use, thereby losing use value. It is characterized by cracking, stickiness, hardening, softening, chalking, discoloration, mildew, etc.