1
|
Fornacon-Wood C, Manjunatha BR, Stühler MR, Gallizioli C, Müller C, Pröhm P, Plajer AJ. Precise cooperative sulfur placement leads to semi-crystallinity and selective depolymerisability in CS 2/oxetane copolymers. Nat Commun 2023; 14:4525. [PMID: 37500621 PMCID: PMC10374558 DOI: 10.1038/s41467-023-39951-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 07/05/2023] [Indexed: 07/29/2023] Open
Abstract
CS2 promises easy access to degradable sulfur-rich polymers and insights into how main-group derivatisation affects polymer formation and properties, though its ring-opening copolymerisation is plagued by low linkage selectivity and small-molecule by-products. We demonstrate that a cooperative Cr(III)/K catalyst selectively delivers poly(dithiocarbonates) from CS2 and oxetanes while state-of-the-art strategies produce linkage scrambled polymers and heterocyclic by-products. The formal introduction of sulfur centres into the parent polycarbonates results in a net shift of the polymerisation equilibrium towards, and therefore facilitating, depolymerisation. During copolymerisation however, the catalyst enables near quantitative generation of the metastable polymers in high sequence selectivity by limiting the lifetime of alkoxide intermediates. Furthermore, linkage selectivity is key to obtain semi-crystalline materials that can be moulded into self-standing objects as well as to enable chemoselective depolymerisation into cyclic dithiocarbonates which can themselves serve as monomers in ring-opening polymerisation. Our report demonstrates the potential of cooperative catalysis to produce previously inaccessible main-group rich materials with beneficial chemical and physical properties.
Collapse
Affiliation(s)
- Christoph Fornacon-Wood
- Intitut für Chemie und Biochemie., Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Bhargav R Manjunatha
- Intitut für Chemie und Biochemie., Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Merlin R Stühler
- Intitut für Chemie und Biochemie., Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Cesare Gallizioli
- Intitut für Chemie und Biochemie., Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Carsten Müller
- Intitut für Chemie und Biochemie., Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Patrick Pröhm
- Intitut für Chemie und Biochemie., Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Alex J Plajer
- Intitut für Chemie und Biochemie., Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany.
| |
Collapse
|
2
|
Xia Y, Yue X, Sun Y, Zhang C, Zhang X. Chemically Recyclable Polyethylene-like Sulfur-Containing Plastics from Sustainable Feedstocks. Angew Chem Int Ed Engl 2023; 62:e202219251. [PMID: 36737409 DOI: 10.1002/anie.202219251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/20/2023] [Accepted: 02/03/2023] [Indexed: 02/05/2023]
Abstract
The green revolution in plastics should be accelerated due to growing sustainability concerns. Here, we develop a series of chemically recyclable polymers from the first reported cascade polymerization of H2 O, COS, and diacrylates. In addition to abundant feedstocks, the method is efficient and air-tolerant, uses common organic bases as catalysts, and yields polymers with high molecular weights under mild conditions. Such polymers, structurally like polyethylene with low-density in-chain polar groups, manifest impressive toughness and ductility comparable to high-density polyethylene. The in-chain ester group acts as a breaking point, enabling these polymers to undergo chemical recycling through two loops. The structures and properties of these polymers also have an immeasurably expanded range owing to the versatility of our method. The readily available raw materials, facile synthesis, and high performance make these polymers promising prospects as sustainable materials in practice.
Collapse
Affiliation(s)
- Yanni Xia
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xinchen Yue
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Yue Sun
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Chengjian Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xinghong Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.,Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou, 310027, China.,Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Hangzhou, 310027, China
| |
Collapse
|
3
|
Ullah Khan M, Ullah Khan S, Cao X, Usman M, Yue X, Ghaffar A, Hassan M, Zhang C, Zhang X. Copolymerization of Carbonyl Sulfide and Propylene Oxide via a Heterogeneous Prussian Blue Analogue Catalyst with High Productivity and Selectivity. Chem Asian J 2023; 18:e202201050. [PMID: 36342176 DOI: 10.1002/asia.202201050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/01/2022] [Indexed: 11/09/2022]
Abstract
This study demonstrates the superiority of a stable and well-defined heterogeneous cobalt hexacyanocobaltate (Co3 [Co(CN)6 ]2 ), a typical cobalt Prussian Blue Analogue (CoCo-PBA) that catalyzes the copolymerization of carbonyl sulfide (COS) and propylene oxide (PO) to produce poly(propylene monothiocarbonate)s (PPMTC). The number-average molecular weights of the PPMTC were 66.4 to 139.4 kg/mol, with a polydispersity of 2.0-3.9. The catalyst productivity reached 1040 g polymer/g catalyst (12.0 h). The oxygen-sulfur exchange reaction (O/S ER), which would generate random thiocarbonate and carbonate units, was effectively suppressed, and thus the selectivity of the monothiocarbonate over carbonate linkages was up to >99%. It was shown that no cyclic thiocarbonate byproduct was produced during the heterogeneous catalysis of COS/PO copolymerization using CoCo-PBA as the catalyst. The content of monothiocarbonate and ether units in the copolymer chain could be regulated by tuning the feeding amount of COS.
Collapse
Affiliation(s)
- Munir Ullah Khan
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Science at the Microscale, School of Life Sciences, University of Science and Technology of China, 230027, Hefei, P. R. China
| | - Xiaohan Cao
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Muhammad Usman
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xinchen Yue
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Abdul Ghaffar
- Advanced Materials Research Center, Zhejiang University-University of Illinois at Urbana-Champaign Institute (ZJU-UIUC), 718 East Haizhou Road, Haining, 314400, Zhejiang, P. R. China
| | - Muhammad Hassan
- Advanced Materials Research Center, Zhejiang University-University of Illinois at Urbana-Champaign Institute (ZJU-UIUC), 718 East Haizhou Road, Haining, 314400, Zhejiang, P. R. China
| | - Chengjian Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xinghong Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China.,Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, 030013, Shanxi, P. R. China
| |
Collapse
|
4
|
Zhuo C, Cao H, Wang X, Liu S, Wang X. Polymeric aluminum porphyrin: Controllable synthesis of ultra-low molecular weight CO2-based polyols. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
5
|
Wang Y, Xia Y, Hua Z, Zhang C, Zhang X. Chemoselective Ring-Opening Copolymerization of Five-Membered Cyclic Carbonates and Carbonyl Sulfide toward Poly(thioether)s. Polym Chem 2022. [DOI: 10.1039/d2py01014c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five-membered cyclic carbonate (5-CC) has the advantages of wide availability, low toxicity, and low volatility, but extremely low ring strain makes it a thermodynamically "non-polymerizable" monomer. This work, for the...
Collapse
|