聚烯烃
聚合物
弹性体
材料科学
高分子科学
玻璃化转变
聚合
嬉戏
聚乙烯
工作(物理)
高分子化学
纳米技术
复分解
复合材料
机械工程
图层(电子)
工程类
作者
Yucheng Zhao,Emma M. Rettner,Katherine Harry,Zhitao Hu,Joel Miscall,Nicholas A. Rorrer,Garret M. Miyake
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2023-10-19
卷期号:382 (6668): 310-314
被引量:30
标识
DOI:10.1126/science.adh3353
摘要
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 (Tm) and low glass transition temperature (Tg), making them suitable for use across diverse applications (Tm as high as 128°C and Tg as low as -60°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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