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Title Chemically recyclable polyolefin-like multiblock polymers
ID_Doc 17990
Authors Zhao, YC; Rettner, EM; Harry, KL; Hu, ZT; Miscall, J; Rorrer, NA; Miyake, GM
Title Chemically recyclable polyolefin-like multiblock polymers
Year 2023
Published Science, 382, 6668
Abstract Polyolefins are the most important and largest volume plastics produced. Unfortunately, the enormous use of plastics and lack of effective disposal or recycling options have created a plastic waste catastrophe. In this work, we report an approach to create chemically recyclable polyolefin-like materials with diverse mechanical properties through the construction of multiblock polymers from hard and soft oligomeric building blocks synthesized with ruthenium-mediated ring-opening metathesis polymerization of cyclooctenes. The multiblock polymers exhibit broad mechanical properties, spanning elastomers to plastomers to thermoplastics, while integrating a high melting transition temperature (T-m) and low glass transition temperature (T-g), making them suitable for use across diverse applications (T-m as high as 128 degrees C and T-g as low as -60 degrees C). After use, the different plastics can be combined and efficiently deconstructed back to the fundamental hard and soft building blocks for separation and repolymerization to realize a closed-loop recycling process.
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