Poly (methyl) acrylate block polymer as well as preparation method and application thereof

The invention discloses a poly (methyl) acrylate block polymer as well as a preparation method and application thereof. The poly (methyl) acrylate block polymer is shown as a formula I in the specification, wherein R1 is C1-C22 linear alkyl or C1-C22 branched alkyl, R2 is hydrogen or methyl, R3 is hydrogen or methyl, R4 is at least one fluorine atom substituted C1-C22 linear alkyl or C1-C22 branched alkyl, and m and n are independently integers not less than 1. A multi-functional poly (methyl) acrylate viscosity index improver is synthesized by utilizing an RAFT (Reversible Addition-Fragmentation Chain Transfer) free radical polymerization technology, and compared with a poly (methyl) alkyl acrylate copolymer, lubricating oil prepared from the poly (methyl) acrylic acid alkyl-(methyl) acrylic acid fluorine-containing alkyl ester block polymer has a lower friction coefficient. 本发明公开了一种聚(甲基)丙烯酸酯类嵌段聚合物及其制备方法和应用，该聚(甲基)丙烯酸酯类嵌段聚合物如式Ⅰ所示；其中，R1为C1-C22直链烷基或C1-C22支链烷基，R2为氢或甲基，R3为氢或甲基，R4为至少含一个氟原子取代的C1-C22直链烷基或C1-C22支链烷基，