Application of phosphorus ylides organophosphorus as lewis base in catalysis of polar vinyl monomer polymerization

By using phosphorus ylide organophosphorus as a Lewis base catalyst in synergy with Lewis acids, the molecular weight distribution and copolymerization problems in the polymerization of polar vinyl monomers were solved, achieving efficient and stable polymerization of polar vinyl monomers, synthesizing high molecular weight polymers with narrow distribution, and simplifying the reaction conditions.

CN117106113BActive Publication Date: 2026-04-14GANNAN NORMAL UNIV
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Patent Information

Application Number
CN202311084031.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-28
Publication Date
2026-04-14
Estimated Expiration
2043-08-28

AI Technical Summary

Technical Problem

Existing technologies for the polymerization of polar vinyl monomers suffer from several problems: a narrow molecular weight distribution and high molecular weight cannot be achieved simultaneously; transition metal catalysts are required; reaction conditions are stringent; polymerization rates decrease as monomer concentration decreases; and different monomers are difficult to copolymerize.

Method used

Organophosphorus ylidene catalysts were used as Lewis base catalysts, combined with Lewis acids, to achieve active and controllable polymerization of polar vinyl monomers through conjugate addition polymerization, including homopolymerization, random copolymerization and block copolymerization. Organoboron and/or organoaluminum were used as Lewis acids, and the catalyst ratio and reaction conditions were optimized.

Benefits of technology

It achieves the synthesis of high molecular weight polymers (molecular weights above 106 g/mol), narrow molecular weight distribution (PDI < 1.10), high monomer conversion rate (close to 100%) and stable polymerization rate, and can achieve copolymerization of vinyl monomers with different polarities, simplifying the synthesis steps and reducing the use of precious metals.

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Abstract

The application provides application of phosphorus ylide organophosphine as Lewis base in catalysis of polar vinyl monomer polymerization, and belongs to the technical field of polymer synthesis. The application utilizes phosphorus ylide organophosphine as Lewis base, and through Lewis base and Lewis acid synergistic catalysis of polar vinyl monomer polymerization under the cooperation of Lewis acid, realizes active controllable polymerization of polar vinyl monomer by changing steric hindrance and electronic effect of Lewis acid and Lewis base, and can realize active controllable homopolymerization and copolymerization (random copolymerization and block copolymerization) of different polar vinyl monomers. The molecular weight of the obtained polymer increases with the increase of the monomer to catalyst ratio, so that the system can realize the molecular weight of the polymer reaching more than 10 6 g / mol, the measured value of the molecular weight of the obtained polymer is basically consistent with the theoretical value, the monomer conversion rate is 100%, and the initiation efficiency is close to 100%.
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