Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: April 26, 2025
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(19)
Published: March 11, 2024
Abstract Photocatalytic upcycling and depolymerization of vinyl polymers have emerged as promising strategies to combat plastic pollution promote a circular economy. This mini review critically summarizes current developments in the degradation including polystyrene poly(meth)acrylates. Of these material classes, polymethacrylates possess unique possibility undergo photocatalytic back monomer under thermodynamically favourable conditions, thus presenting significant advantages over traditional thermal strategies. Our perspective on formidable challenges potential future directions are also discussed.
Language: Английский
Citations
33
Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(16), P. 9457 - 9579
Published: Aug. 16, 2024
The large production volumes of commodity polyolefins (specifically, polyethylene, polypropylene, polystyrene, and poly(vinyl chloride)), in conjunction with their low unit values multitude short-term uses, have resulted a significant pressing waste management challenge. Only small fraction these is currently mechanically recycled, the rest being incinerated, accumulating landfills, or leaking into natural environment. Since are energy-rich materials, there considerable interest recouping some chemical value while simultaneously motivating more responsible end-of-life management. An emerging strategy catalytic depolymerization, which portion C-C bonds polyolefin backbone broken assistance catalyst and, cases, additional molecule reagents. When products molecules materials higher own right, as feedstocks, process called upcycling. This review summarizes recent progress for four major upcycling strategies: hydrogenolysis, (hydro)cracking, tandem processes involving metathesis, selective oxidation. Key considerations include macromolecular reaction mechanisms relative to mechanisms, design transformations, effect conditions on product selectivity. Metrics describing critically evaluated, an outlook future advances described.
Language: Английский
Citations
29
Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7309 - 7327
Published: Jan. 1, 2024
Oxidative degradation is a powerful method to degrade plastics into oligomers and small oxidized products. While thermal energy has been conventionally employed as an external stimulus, recent advances in photochemistry have enabled photocatalytic oxidative of polymers under mild conditions. This tutorial review presents overview degradation, from its earliest examples emerging strategies. briefly discusses the motivation development with focus on underlying mechanisms. Then, we will examine modern studies primarily relevant catalytic degradation. Lastly, highlight some unique using unconventional approaches for polymer such electrochemistry.
Language: Английский
Citations
27
Nature Reviews Methods Primers, Journal Year: 2025, Volume and Issue: 5(1)
Published: Jan. 9, 2025
Language: Английский
Citations
3
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(18), P. 12271 - 12287
Published: April 24, 2024
The integration of next-generation electronics into society is rapidly reshaping our daily interactions and lifestyles, revolutionizing communication engagement with the world. Future promise stimuli-responsive features enhanced biocompatibility, such as skin-like health monitors sensors embedded in food packaging, transforming healthcare reducing waste. Imparting degradability may reduce adverse environmental impact lead to opportunities for monitoring. While advancements have been made producing degradable materials encapsulants, substrates, dielectrics, availability conducting semiconducting remains restricted. π-Conjugated polymers are promising candidates development conductors or semiconductors due ability tune their stimuli-responsiveness, mechanical durability. This perspective highlights three design considerations: selection π-conjugated monomers, synthetic coupling strategies, degradation polymers, generating electronics. We describe current challenges monomeric present options circumvent these issues by highlighting biobased compounds known pathways stable monomers that allow chemically recyclable polymers. Next, we strategies compatible synthesis including direct arylation polymerization enzymatic polymerization. Lastly, discuss various modes depolymerization characterization techniques enhance comprehension potential byproducts formed during polymer cleavage. Our considers parameters parallel rather than independently while having a targeted application mind accelerate discovery high-performance organic
Language: Английский
Citations
14
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(22), P. 15428 - 15437
Published: May 25, 2024
Chemical recycling to monomers (CRM) offers a promising closed-loop approach transition from current linear plastic economy toward more sustainable circular paradigm. Typically, this has focused on modulating the ceiling temperature (Tc) of monomers. Despite considerable advancements, polymers with low Tc often face challenges such as inadequate thermal stability, exemplified by poly(γ-butyrolactone) (PGBL) decomposition ∼200 °C. In contrast, floor (Tf)-regulated polymers, particularly those synthesized via ring-opening polymerization (ROP) macrolactones, inherently exhibit enhanced thermodynamic stability increases. However, development Tf regulated chemically recyclable remains relatively underexplored. context, judicious design and efficient synthesis biobased macrocyclic diester monomer (HOD), we developed type -regulated poly(ketal-ester) (PHOD). First, entropy-driven ROP HOD generated high-molar mass PHOD exceptional Td,5% reaching up 353 Notably, it maintains high 345 °C even without removing catalyst. This contrasts markedly PGBL, which spontaneously depolymerizes back above its in presence Second, displays outstanding chemical recyclability at room within just 1 min tBuOK. Finally, copolymerization pentadecanolide (PDL) high-performance copolymers (PHOD-co-PPDL) tunable mechanical properties both components.
Language: Английский
Citations
13
RSC Applied Polymers, Journal Year: 2024, Volume and Issue: 2(2), P. 275 - 283
Published: Jan. 1, 2024
Efficient, fast and versatile depolymerization of bromine-terminated polymers.
Language: Английский
Citations
9
Progress in Polymer Science, Journal Year: 2024, Volume and Issue: 156, P. 101871 - 101871
Published: Aug. 22, 2024
Language: Английский
Citations
9
Nature Chemical Engineering, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
Language: Английский
Citations
1
ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(16), P. 12437 - 12453
Published: Aug. 5, 2024
Synthetic polymers play an indispensable role in modern society, finding applications across various sectors ranging from packaging, textiles, and consumer products to construction, electronics, industrial machinery. Commodity plastics are cheap produce, widely available, versatile meet diverse application needs. As a result, millions of metric tons manufactured annually. However, current approaches for the chemical recycling postconsumer plastic waste, primarily based on pyrolysis, lag efficiency compared their production methods. In recent years, significant research has focused developing milder, economically viable methods commodity plastics, which involves converting waste back into monomers or transforming it other valuable chemicals. This Perspective examines both cutting-edge laboratory-scale contributing advancements field recycling.
Language: Английский
Citations
8