Chemical Science, Год журнала: 2024, Номер 15(24), С. 9353 - 9360
Опубликована: Янв. 1, 2024
An expedient synthesis of electron-deficient styrenes is accomplished through decarboxylation and oxidation via halogen ion transfer. The resulting umpoled intermediates undergo a rebound elimination to furnish olefins.
Язык: Английский
Chemical Reviews, Год журнала: 2024, Номер 124(7), С. 4393 - 4478
Опубликована: Март 22, 2024
Polyesters carrying polar main-chain ester linkages exhibit distinct material properties for diverse applications and thus play an important role in today's plastics economy. It is anticipated that they will even greater tomorrow's circular economy focuses on sustainability, thanks to the abundant availability of their biosourced building blocks presence bonds can be chemically or biologically cleaved demand by multiple methods bring about more desired end-of-life plastic waste management options. Because this potential promise, there have been intense research activities directed at addressing recycling, upcycling biodegradation existing legacy polyesters, designing biorenewable alternatives, redesigning future polyesters with intrinsic chemical recyclability tailored performance rival commodity are either petroleum based and/or hard recycle. This review captures these exciting recent developments outlines challenges opportunities. Case studies poly(lactic acid), poly(3-hydroxyalkanoate)s, poly(ethylene terephthalate), poly(butylene succinate), poly(butylene-adipate presented, emerging recyclable comprehensively reviewed.
Язык: Английский
Процитировано
116
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Фев. 17, 2024
Abstract Ethylene/α-olefin copolymers are produced in huge scale and widely used, but their after-use disposal has caused plastic pollution problems. Their chemical inertness made re/upcycling difficult. Ideally, PE materials should be de novo to have a circular closed-loop lifecycle. However, synthesis of ethylene/α-olefin copolymers, including high-volume, linear low-density as well high-value olefin elastomers block presents particular challenge due difficulties introducing branches while simultaneously installing recyclability directly using industrial ethylene α-olefin feedstocks. Here we show that coupling coordination copolymerization α-olefins with designed functionalized chain-transfer agent, followed by modular assembly the resulting AB telechelic polyolefin building blocks polycondensation, affords series ester-linked PE-based copolymers. These new not only retain thermomechanical properties also exhibit full circularity via simple transesterification markedly enhanced adhesion polar surfaces.
Язык: Английский
Процитировано
26
Energy & Fuels, Год журнала: 2024, Номер 38(3), С. 1676 - 1691
Опубликована: Янв. 22, 2024
Mechanical recycling of plastic waste is not sustainable and inefficient in terms the resources needed to accomplish process, quality materials obtained from this technique substandard. Chemical polymers appears be preferable because technology allows for production new materials. This review compiles most recent research which selected transition metals are used as catalysts hydrogenolytic depolymerization polyolefins a polymer upcycling process. Hydrogenolysis an emerging chemical method that uses transition-metal complexes presence hydrogen cleave C–C bonds substances into shorter hydrocarbons. Transition such Ruthenium (Ru), Platinum (Pt), Nickel (Ni), Cobalt (Co), Zirconium (Zr), Tantalum (Ta), Rhodium (Rh) have been utilized recently type reaction. hydrogenolysis can produce valuable hydrocarbon products, gas/liquid fuels lubricating oils, under relatively milder operational conditions with less environmental impact. The focused on supported metal organometal catalytic system their mechanism polyolefin pathways detailed investigation impact reaction parameters high gasoline, diesel, light lubricants.
Язык: Английский
Процитировано
25
Science China Chemistry, Год журнала: 2024, Номер 67(9), С. 2803 - 2841
Опубликована: Авг. 12, 2024
Язык: Английский
Процитировано
22
Chemical Science, Год журнала: 2023, Номер 15(3), С. 795 - 831
Опубликована: Дек. 8, 2023
The critical task of activating and cleaving inert C–C bonds during plastic upcycling recycling holds substantial importance.
Язык: Английский
Процитировано
25
Polymer, Год журнала: 2024, Номер unknown, С. 126698 - 126698
Опубликована: Янв. 1, 2024
Язык: Английский
Процитировано
16
Chemical Science, Год журнала: 2024, Номер 15(23), С. 8606 - 8624
Опубликована: Янв. 1, 2024
Electrochemistry shows promising new avenues in the recycling of polymeric materials. This work reviews electrochemical depolymerization, post-polymerization functionalization, and paired catalysis, highlighting future challenges opportunities.
Язык: Английский
Процитировано
12
Journal of Energy Storage, Год журнала: 2024, Номер 96, С. 112671 - 112671
Опубликована: Июнь 24, 2024
Язык: Английский
Процитировано
12
Chemical Society Reviews, Год журнала: 2024, Номер 53(19), С. 9609 - 9651
Опубликована: Янв. 1, 2024
We present the state-of-the-art of circular polymers based on monomer and polymer design reversible ring-opening addition polymerization reactions without involvement other reactants.
Язык: Английский
Процитировано
11
Polymer Chemistry, Год журнала: 2024, Номер 15(9), С. 884 - 895
Опубликована: Янв. 1, 2024
With neighboring group participation, polypropylene-based transesterification covalent adaptable networks were facilely prepared via the reaction of maleic anhydride grafted polypropylene and diol without using external catalysts.
Язык: Английский
Процитировано
10