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Updated: Aug 10, 2026
08:12
Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Degradable Alternating Copolymers With Strained Cyclobutane Backbones via Photocontrolled RAFT Polymerization
Xia Hu1, Hongsik Kim1, Lianqian Wu1
1Department of Materials, ETH Zurich, Zurich, Switzerland.
Angewandte Chemie (International Ed. in English)
|August 8, 2026
Summary
Researchers developed novel copolymers using a visible-light process. These advanced polymers feature unique backbones, high thermal stability, and controlled degradation, offering new material possibilities.
Area of Science:
- Polymer Chemistry
- Organic Synthesis
- Materials Science
Background:
- Controlled radical polymerization techniques are crucial for designing advanced materials.
- Strained cyclic monomers offer unique reactivity for polymer synthesis.
- Visible-light-mediated polymerization provides spatiotemporal control.
Purpose of the Study:
- To report a novel reversible addition-fragmentation chain transfer (RAFT) alternating copolymerization method.
- To synthesize well-defined copolymers from 1,3-disubstituted bicyclo[1.1.0]butanes (BCBs) and various comonomers.
- To investigate the properties and degradation behavior of the resulting polymers.
Main Methods:
- Utilizing a reversible addition-fragmentation chain transfer (RAFT) process.
- Employing a visible-light-mediated photoiniferter approach.
- Synthesizing electronically and sterically tuned BCB monomers for controlled reactivity.
Main Results:
- Achieved high-degree alternation in BCB-derived copolymers.
- Demonstrated tunable molecular weights and excellent end-group fidelity.
- Synthesized polymers with high thermal stability (up to 429°C) and efficient mechanical degradation.
Conclusions:
- Successfully developed a RAFT alternating copolymerization for BCBs under visible light.
- Created novel polymers with strained cyclobutane backbones and desirable properties.
- Highlighted the potential of these materials for applications requiring thermal stability and controlled degradation.
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