Slip ring grafted polyrotaxane multi-block topological copolymer, its preparation method and application

CN121736209BActive Publication Date: 2026-07-21ANHUI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI UNIV
Filing Date
2026-02-25
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Traditional block copolymers have insufficient stress dissipation capacity in compatibilizers, and their synthesis process is cumbersome and difficult to adapt to conventional processing technology, which limits the improvement of material toughness.

Method used

By employing a slip ring-grafted polyrotaxane multiblock topological copolymer, different functional segments are connected by mechanical bonds to construct a stress dissipation mechanism. The main chain and side chains are independently controlled through a "one-pot method" to form a polymer structure with sliding freedom.

Benefits of technology

It significantly improves the compatibility and mechanical properties of blended materials, simplifies the synthesis process, enables precise control of chain segment length and grafting density, and enhances the strength, toughness and processing adaptability of materials.

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Abstract

This invention belongs to the field of polymer materials technology, and provides a slip-ring grafted polyrotaxane multi-block topological copolymer, its preparation method, and its applications. This topological copolymer comprises a multi-block copolymer backbone and multiple grafted polyester side chains in cyclic molecules, wherein: the cyclic molecules and the backbone form a mechanically interlocked polyrotaxane topological structure, which slides freely along the inner segments of the backbone due to steric hindrance of the outer segments; the outer segments of the backbone and the slip-ring grafted polyester side chains are incompatible segments with different polarities and / or crystallization thermodynamics. The preparation method uses polyether, cyclodextrin or its derivatives, and polymeric monomers as raw materials, and completes the process through a one-pot reaction involving assembly and stepwise polymerization. This topological copolymer, through its incompatible segments, can form physical interpenetration between the two phases of a microphase-separated system, and utilizes the slip-ring mechanical interlocking structure to buffer external forces and dissipate energy, thereby significantly improving the bonding strength and stability of the phase interface. It can be used as a high-performance blend compatibilizer and toughening additive.
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