Abstract: The present invention discloses a multiblock copolymer with narrow molecular weight distribution and a preparation method therefor. According to the present disclosure, a series of multiblock copolymers with narrow molecular weight distribution are prepared by adopting a reversible addition chain transfer free radical polymerization technology in an emulsion polymerization system by controlling the feeding sequence of monomers. The molecular weight of the series of multiblock copolymers meets theoretical expectations, the content of dead polymers is low, and the mechanical properties are greatly improved compared with the traditional triblock copolymers.

Abstract: The present invention discloses a multiblock copolymer with narrow molecular weight distribution and a preparation method therefor. According to the present disclosure, a series of multiblock copolymers with narrow molecular weight distribution are prepared by adopting a reversible addition chain transfer free radical polymerization technology in an emulsion polymerization system by controlling the feeding sequence of monomers. The molecular weight of the series of multiblock copolymers meets theoretical expectations, the content of dead polymers is low, and the mechanical properties are greatly improved compared with the traditional triblock copolymers.

Abstract: Disclosed are a high melt index thermoplastic elastomer and a preparation method therefor. in the present invention, an emulsion polymerization system and a reversible addition chain transfer free radical polymerization technique are used, and a thermoplastic elastomer having a block structure with a high melt index is obtained by means of controlling reaction temperatures of different stages. The present invention is simple in terms of workflow and equipment and energy-saving and environmentally friendly in terms of process, and the raw materials thereof are cheap and easy to obtain, and the resulting high melt index thermoplastic elastomer has an excellent hot workability.