Polymer Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
The recent advancements in the synthesis of sustainable polyesters mediated by base/(thio)urea binary catalysts are discussed, focusing on catalytic mechanism, activity and selectivity as well current challenges future directions.
Language: Английский
Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(9), P. 2803 - 2841
Published: Aug. 12, 2024
Language: Английский
Citations
22
Science, Journal Year: 2025, Volume and Issue: 387(6731), P. 297 - 303
Published: Jan. 16, 2025
Commercial adhesives are petroleum-based thermoset networks or nonbiodegradable thermoplastic hot melts, making them ideal targets for replacement by biodegradable alternatives. Poly(3-hydroxybutyrate) (P3HB) is a biorenewable and alternative to conventional plastics, but microbial P3HB, which has stereoperfect stereomicrostructure, exhibits no adhesion. In this study, elucidating the fundamental relationship between chemocatalytically engineered P3HB stereomicrostructures adhesion properties, we found that syndio-rich high strength outperforms common commercial adhesives, whereas syndiotactic, isotactic, iso-rich shows measurable The stereomicrostructure brings about desired thermomechanical viscoelastic properties of enable strong range substrates tested, including aluminum, steel, glass, wood, its performance insensitive molar mass reprocessing reuse.
Language: Английский
Citations
3
Chemical Communications, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
A novel terephthalate-based ionic liquid catalyst is promotes highly efficient neutral hydrolysis of PET without attendant inactivation or product contamination.
Language: Английский
Citations
3
Langmuir, Journal Year: 2024, Volume and Issue: 40(35), P. 18512 - 18524
Published: Aug. 21, 2024
This study presents the synthesis and characterization of a novel phosphotungstic acid-functionalized hercynite@SiO
Language: Английский
Citations
17
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
Enthalpy is often the focal point when designing monomers for polymer circularity, but much less explored on how entropy can be exploited to create polymers with synergistic circularity and properties. Here, we design a series of spiro-lactones (SLs) closed-chain cycloalk(en)yl substituents at α,α-position δ-valerolactone (δVL), which, combined parent δVL gem-α,α-dialkyl-substituted open-chain alkyl groups, provide desired platform exploring circular by focusing change polymerization. These SLs exhibit finely balanced (de)polymerizability that regulated chiefly differentiation, allowing both facile synthesis polyester PSLs (Mn up 1000 kg mol–1) in living fashion selective depolymerization completely recover under mild conditions (using recyclable catalyst 100 °C). One such PSL semicrystalline (Tm = 134 °C), strong (ultimate strength 43 MPa), hard (modulus 1.85 GPa), modestly flexible. notable mechanical properties are bolstered its superior barriers oxygen moisture permeation compared common packaging materials. In addition, this postfunctionalized OH-containing shows higher adhesion than comparative commercial adhesives.
Language: Английский
Citations
2
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
While synthesizing circular polymers with telechelic polyolefin building blocks recently emerged as a promising strategy for addressing conventional polyethylenes' sustainability challenges, the lack of iPP (tPP) sufficient difunctional purity polycondensation has been limiting development polypropylenes iPP-like structures and properties. Here we described combined approach coordinative chain transfer polymerization transition-metal-catalyzed quenching reaction various acyl chlorides, affording tPPs high ratio (up to ∼99%) broad end functional group scope. The steric effect polymeryl-Zn species role Pd catalyst were revealed by DFT. This method also solved low challenge polyethylenes. Ester-linked iPPs structure thermomechanical properties PE/iPP multiblock copolymers synthesized resulting tPPs.
Language: Английский
Citations
2
Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
Language: Английский
Citations
2
Chinese Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 25, 2025
Language: Английский
Citations
2
ACS Macro Letters, Journal Year: 2024, Volume and Issue: 13(9), P. 1112 - 1118
Published: Aug. 12, 2024
A robust and fully biobased covalent adaptable network (CAN) that allows recyclability, biocompatibility, controlled biodegradability is reported. The CAN was fabricated through a simple photo-cross-linking method, wherein low-molecular-weight poly(lactic acid) (∼3 kDa) modified with end 1,2-dithiolane rings one-step Steglich esterification reaction thioctic acid (TA). These incorporated undergo photoinduced ring-opening polymerization, thus enabling the cross-linking of abundant dynamic disulfide bonds. resultant demonstrates excellent transparency, effective UV-blocking capabilities below 320 nm, tensile strength (∼39 MPa), superior dimensional stability at 80 °C, alongside attractive biocompatibility. Moreover, owing to exchange redox-responsiveness bonds, material can be recycled by hot-pressing reduction–oxidation process while also being capable controllably biodegrading its lifecycle. Furthermore, it exhibits reconfigurable shape memory properties fast recovery. This study elucidates straightforward approach fabricating multifunctional sustainable polymer materials potential applications in diverse fields such as packaging, coating, biomedicine.
Language: Английский
Citations
7
International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 140529 - 140529
Published: Jan. 1, 2025
Language: Английский
Citations
1