Polystyrene(PS)has shortcomings such as brittleness,low glass transition temperature,and insufficient impact resistance,which limit its application areas.The hydrogenation of benzene ring in PS can effectively improve its performance.A hydrogenation catalyst for PS hydrogenation reaction can be prepared through loading Ni-Pd bimetallic materials on graphene oxide(GO)modified carbon nanotubes(CNTs).Results indicate that GO modified CNTs loaded Ni-Pd bimetallic catalyst exhibits high catalytic activity and stability.Under the reaction conditions that mass fraction of catalyst is 7.5％,reaction temperature is 153℃,reaction pressure is 5.4 MPa,and the reaction lasts for 6.2 h,the conversion of PS exceeds 99％,and the chain length retention rate of the hydrogenated PS reaches 90％.The hydrogenated PS has an improved mechanical property,a higher glass transition temperature,lower density and lower water absorption rate.
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