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Switchable Polymerization Organocatalysis: From Monomer Mixtures to Block Copolymers
Jiadong Tang1,2, Maosheng Li1, Xianhong Wang1
1Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun, 130022, P. R. China.
Angewandte Chemie (International Ed. in English)
|February 2, 2022
Summary
This study presents a one-pot method for producing sequence-controlled block copolymers from mixed monomers using a novel organocatalyst. The process achieves high carbon dioxide conversion and precise polymer sequence control.
Area of Science:
- Polymer Chemistry
- Organocatalysis
- Materials Science
Background:
- Producing sequence-controlled block copolymers from mixed monomers in a single pot is challenging.
- Existing methods often lack efficiency and precise control over polymer sequence.
Purpose of the Study:
- To develop a one-pot protocol for sequence-controlled block copolymer synthesis.
- To achieve high carbon dioxide conversion in the polymerization process.
Main Methods:
- Utilized a switchable Lewis-pair organocatalyst for polymerization.
- Employed a mixture of O-carboxyanhydride (OCA) and epoxide monomers.
- Investigated the tandem polymerization mechanism through calculations and experiments.
Main Results:
- Achieved exclusive and sequential polymerization of OCA followed by epoxide and CO2.
- Synthesized sequence-controlled block copolymers with up to 99% CO2 conversion.
- Demonstrated a chemoselective and cooperative catalytic mechanism.
Conclusions:
- The developed one-pot protocol enables efficient synthesis of sequence-controlled block copolymers.
- The catalyst and monomer selection ensure high sequence selectivity and CO2 utilization.
- The findings offer a new pathway for advanced polymer material design.
Keywords:
Block CopolymerizaitionO-CarboxyanhydridesOrganocatalysisRing-Opening PolymerizationSwitchable PolymerizationMore Related Videos
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