Deconstruction of Polymers through Olefin Metathesis

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(11), P. 7007 - 7044

Published: May 24, 2024

The consumption of synthetic polymers has ballooned; so the amount post-consumer waste generated. current polymer economy, however, is largely linear with most being either landfilled or incinerated. lack recycling, together sizable carbon footprint industry, led to major negative environmental impacts. Over past few years, chemical recycling technologies have gained significant traction as a possible technological route tackle these challenges. In this regard, olefin metathesis, its versatility and ease operation, emerged an attractive tool. Here, we discuss developments in olefin-metathesis-based technologies, including development new materials application metathesis commercial materials. We delve into structure–reactivity relationships context polymerization–depolymerization behavior, how experimental conditions influence deconstruction outcomes, reaction pathways underlying approaches. also look at hurdles adopting relevant future directions for field.

Language: Английский

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Design of depolymerizable polymers toward a circular economy

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(5), P. 2384 - 2420

Published: Jan. 1, 2024

While our society is facing the challenge of accumulating plastic waste, this review discusses recent advances towards polymer circularity with an emphasis on manipulations monomer–polymer equilibrium to create chemically recyclable polymers.

Language: Английский

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Cryopolymerization of 1,2-Dithiolanes for the Facile and Reversible Grafting-from Synthesis of Protein–Polydisulfide Conjugates

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(3), P. 1217 - 1221

Published: Jan. 13, 2020

Grafting-from (GF) is an important yet underdeveloped strategy toward protein–polymer conjugates. Here, we report a simple cryopolymerization method that enables highly efficient GF synthesis of cell-penetrating protein–polydisulfide Rapid and controlled ring-opening polymerization 1,2-dithiolanes under cryo-conditions can be initiated by proteins bearing reactive cysteine, owing to both favored thermodynamics augmented kinetics arising from frozen-induced high local concentration substrates. This applicable various wild-type or genetically engineered without the need chemical installation initiation group. The resulting conjugates reversibly degrafted mild conditions regenerate functional "native" in traceless fashion. These unique features make such useful applications as dynamic switch protein functions, cytosolic delivery therapeutics, purification. also potentially for situ growth other types polymers surface.

Language: Английский

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Intrinsically Photopolymerizable Dynamic Polymers Derived from a Natural Small Molecule

ACS Applied Materials & Interfaces, Journal Year: 2021, Volume and Issue: 13(37), P. 44860 - 44867

Published: Sept. 9, 2021

Developing photopolymerizable polymeric materials offers many opportunities to process in a remote and controllable manner. However, most technologies require the external introduction of photoabsorbing units, whereas designing intrinsically polymers is still highly challenging. Here, we report that natural small-molecule disulfide, thioctic acid, can be directly transformed into poly(disulfides) network under irradiation visible light without any additives. The resulting polymer exhibits optical transparency, mechanical stretchability toughness, ambient self-healing ability, especially strong adhesive ability different surfaces. dynamic covalent backbones endow depolymerization recycle material closed-loop We foresee this facile robust photopolymerization system great promise toward low-cost high-performance photocuring coatings adhesives.

Language: Английский

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Malleable and thermally recyclable polyurethane foam

Green Chemistry, Journal Year: 2020, Volume and Issue: 23(1), P. 307 - 313

Published: Dec. 11, 2020

Malleable polyurethane (PU) foams bearing disulfide bond were fabricated using conventional foaming technology and could be thermally recycled into PU films through compression molding.

Language: Английский

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