Modified styrene-ethylene-butadiene-styrol copolymer

Abstract

The invention relates to a modified styrene-ethylene-butadiene-styrene copolymer, belonging to the technical field of polymer materials. The modified copolymer includes 50-60 parts of SEBS resin, 1-3 parts of azobisisobutyronitrile, 10-20 parts of methacrylic acid, 5-10 parts of acrylic acid, 80-100 parts of xylene, and 80-100 parts of cyclohexane 100 copies. According to the deficiencies of the SEBS modification method above, the present invention uses azobisisobutyronitrile (AIBN) as an initiator, xylene and cyclohexane as a mixed solution, and methacrylic acid and acrylic acid as grafts to prepare formazan Acrylic-acrylic-acrylic graft-modified SEBS. The graft-modified SEBS has excellent processability.

Description

technical field [0001] The invention relates to a modified copolymer, more specifically, the invention relates to a modified styrene-ethylene-butadiene-styrene copolymer, which belongs to the technical field of polymer materials. Background technique [0002] Polystyrene (S)-polyethylene (E)-polybutadiene (B)-polystyrene (S) (SEBS for short) is obtained by hydrogenation of styrene-butadiene-styrene (SBS). It is a promising thermoplastic elastomer. However, the SEBS molecular chain does not contain polar or reactive groups, and its compatibility with polar engineering plastics such as polyurethane, polyamide, and polyester is poor, which limits its application fields to a large extent. In order to enhance the compatibility of SEBS with polar polymers, compatibilizers need to be added. Research results have shown that only a small amount of grafted product can be added to greatly improve the blending effect. [0003] The graft modification of SEBS can more effectively impro...

AI Technical Summary

Problems solved by technology

For adopting solution grafting method to carry out the research of SEBS grafting maleic anhydride (MAH) reaction, it has been reported that, as adopting solution method to carry out SEBS grafting MAH, this method can obtain SEBS-g-MAH of higher grafting rate , but the reaction time is long, the grafting efficiency is low, and a large amount of toxic and flammable solvents need to be consumed, and the solvent recovery is very expensive, high in cost, serious in harm to the human body, and pollutes the environment, and this method occupies a large area and has high production costs. Difficult to achieve continuous operation