Star-shaped comb type butadiene/phenylethylene block copolymers and preparation method thereof

Abstract

The invention belongs to the technical field of polymer material synthesis and preparation, relating to a star-shaped comb butadiene / styrene segmented copolymer, which is characterized in that the copolymer has the following structure: An-C, wherein A is the butadiene / styrene segmented copolymer, C is star-shaped seed tree coupler residue which is an epoxidation liquid star-shaped copolymer, n is branching degree which is larger or equal to 3, the number average molecular weight of the star-shaped comb segmented copolymer An-C is 5*10<4>-50*10<4>, the number average molecular weight of the segmented copolymer A is 1*10<4>-15*10<4>, the content of styrene is 55 percent to 85 percent (weight percent, same below), the content of butadiene is 15 percent to 45 percent, the content of 1, 2-structure is less than 30 percent (weight percent, which is counted by 100 percent of the total amount of monomer butadiene). The synthesis has the effect and benefit of simplifying the synthetic route of the star-shaped comb butadiene / styrene segmented copolymer, which can be widely applied to the preparation of the star-shaped comb butadiene / styrene segmented copolymer.

Description

technical field

[0001] The invention belongs to the technical field of polymer material synthesis and preparation, relates to the field of synthetic rubber and resin, in particular to a class of star-shaped comb-shaped butadiene / styrene block copolymers and a preparation method thereof. The block copolymer has the following structure: An—C, wherein: A is a butadiene / styrene block copolymer, C is a multifunctional coupling agent residue, n is a branching degree, and n is greater than or equal to 3. Background technique

[0002] The present invention is based on Star-Seed Tree technology, starting from liquid star-shaped polybutadiene, and preparing star-shaped Seed tree, ie: epoxidized liquid star polybutadiene. Star-shaped comb-shaped butadiene / styrene block copolymer was prepared by using epoxidized liquid star-shaped polybutadiene as coupling agent.

[0003] Butadiene / styrene transparent impact resin is a kind of styrene / butadiene / butadiene with high styrene content (usu...