Silicon / nitrogen group-containing functionalized SEPS thermoplastic elastomer and preparation method thereof

By introducing silicon/nitrogen-functionalized 1,1-diphenylethylene derivatives into SEPS thermoplastic elastomers, linear/star-coupled styrene-(ethylene/propylene) block copolymers were prepared, solving the problem of uncontrollable group distribution during SEPS modification and improving the material's performance and application range.

CN121362300APending Publication Date: 2026-01-20DALIAN UNIV OF TECH
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Patent Information

Application Number
CN202511597188.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-04
Publication Date
2026-01-20

AI Technical Summary

Technical Problem

Existing SEPS thermoplastic elastomers have limitations in terms of the uncontrollable number and position of functional groups during modification, restricted application scenarios, low conversion rate, low molecular weight, and poor controllability, which limits the expansion of their application fields.

Method used

Using silicon/nitrogen-functionalized 1,1-diphenylethylene derivatives as comonomers, linear/star-coupled silicon/nitrogen-functionalized styrene-(ethylene/propylene) block copolymers were prepared by selective hydrogenation. The distribution of functional groups in styrene blocks was precisely controlled, thereby improving the utilization efficiency of functional groups.

Benefits of technology

This improved the mechanical properties and compatibility of SEPS, broadened its application areas, and enabled the quantitative localization and efficient utilization of functional groups.

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Abstract

The invention belongs to the technical field of high polymer material modification, and particularly relates to a silicon / nitrogen group-containing functionalized SEPS (styrene-ethylene-propylene) thermoplastic elastomer which is a linear / star-shaped coupled silicon / nitrogen group-containing functionalized polystyrene-(ethylene / propylene) block copolymer. The polystyrene block is composed of a copolymer of styrene and a silicon / nitrogen-containing group functionalized 1, 1-diphenylethylene (DPE) derivative. The prepared SEPS containing the silicon / nitrogen group is a macromolecule, and the viscosity is obviously improved. In the processing process, SEPS containing silicon / nitrogen groups is easily converted into silicon hydroxyl groups, the silicon hydroxyl groups, hydroxyl groups and the like easily form covalent bonds or hydrogen bonds, the compatibility and dispersity of the material are improved, and the SEPS has good application prospects in the fields of asphalt modification, adhesive modification, polymer modification and the like.
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