| Title |
Dual Recycling of Depolymerization Catalyst and Biodegradable Polyester that Markedly Outperforms Polyolefins |
| ID_Doc |
20012 |
| Authors |
Li, XL; Clarke, RW; An, HY; Gowda, RR; Jiang, JY; Xu, TQ; Chen, EYX |
| Title |
Dual Recycling of Depolymerization Catalyst and Biodegradable Polyester that Markedly Outperforms Polyolefins |
| Year |
2023 |
| Published |
Angewandte Chemie-International Edition, 62.0, 26 |
| DOI |
10.1002/anie.202303791 |
| Abstract |
Chemically recyclable, circular polymers continue to attract increasing attention, but rendering both catalysts for depolymerization and high-performance polymers recyclable is a more sustainable yet challenging goal. Here we introduce a dual catalyst/polymer recycling system in that recyclable inorganic phosphomolybdic acid catalyzes selective depolymerization of high-ceiling-temperature biodegradable poly(delta-valerolactone) in bulk phase, which, upon reaching suitable molecular weight, exhibits outstanding mechanical performance with a high tensile strength of approximate to 66.6 MPa, fracture strain of approximate to 904 %, and toughness of approximate to 308 MJ m(-3), and thus markedly outperforms commodity polyolefins, recovering its monomer in pure state and quantitative yield at only 100 degrees C. In sharp contrast, the uncatalyzed depolymerization not only requires a high temperature of >310 degrees C but is also low yielding and non-selective. Importantly, the recovered monomer can be repolymerized as is to reproduce the same polymer, thereby closing the circular loop, and the recycled catalyst can be reused repeatedly for depolymerization runs without loss of its catalytic activity and efficiency. |
| Author Keywords |
Inorganic Polyacid; Metal-Catalyst; Recyclable Polyester; Ring-Opening Polymerization; Thermoplastic |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000988009100001 |
| WoS Category |
Chemistry, Multidisciplinary |
| Research Area |
Chemistry |
| PDF |
https://doi.org/10.1002/anie.202303791
|