期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 32, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202207105
关键词
Chemically Recyclable Polymers; Functionalizable Polyesters; Organocatalysis; Ring-Opening Polymerization; Thermoplastics
资金
- National Natural Science Foundation of China [22075160, 22031005]
- Taishan Scholar Constructive Engineering Foundation [tsqn202103078]
- National Key R&D Program of China [2021YFA1501600]
This study presents a method for chemoselective controlled ring-opening polymerization of bio-renewable bifunctional alpha-methylene-delta-valerolactone (MVL) using strong base/urea binary catalysts. The obtained high molecular weight polyester exhibits good mechanical properties. The pristine monomer can be recovered through thermolysis, establishing a closed-loop life cycle.
It is a highly attractive strategy to develop chemically recyclable polymers to establish a circular plastic economy. Despite the recent advancements, chemically recyclable polymers still face challenges including high energy cost for polymer preparation or recycling, poor monomer recovery selectivity and efficiency as well as undesired material performance. In this contribution, we present the chemoselective controlled ring-opening polymerization of bio-renewable bifunctional alpha-methylene-delta-valerolactone (MVL) to produce exclusive functionalizable polyester using strong base/urea binary catalysts. The obtained polyester with high molar mass exhibits good tensile strength comparable to that of some commodity plastics. Remarkably, the obtained polyester can be depolymerized to recover pristine monomer with a 96 % yield by thermolysis, thus successfully establishing a closed-loop life cycle.
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