Functionalized highly syndiotactic polystyrene and preparation method thereof

A preparation method of a functionalized syndiotactic polystyrene, comprising:

• performing a polymerization of a functionalized styrene or a polymerization of styrene and a functionalized styrene in the presence of a catalyst to obtain the functionalized syndiotactic polystyrene, wherein the functionalized syndiotactic polystyrene comprises a repeating unit having a structure represented by formula (I), or comprises a repeating unit having a structure represented by formula (I) and a repeating unit having a structure represented formula (II):
• wherein the functionalized styrene has a structure represented by formula (III):
• wherein in formula (I) and formula (III),
• R is independently selected from a C1-20 alkoxy group, a C6-20 aryloxy group, a C1-20 alkylthio group, a C6-20 arylthio group, or a C6-20 aryl group;
• m is the number of substituent R and is independently selected from an integer from 1 to 5;
• and
• the catalyst comprises a rare earth complex, an organoboron compound, and an organoaluminum compound.