Synthesis and Deconstruction of Polyethylene-type Materials

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(5), P. 2327 - 2351

Published: Feb. 26, 2024

Polyethylene deconstruction to reusable smaller molecules is hindered by the chemical inertness of its hydrocarbon chains. Pyrolysis and related approaches commonly require high temperatures, are energy-intensive, yield mixtures multiple classes compounds. Selective cleavage reactions under mild conditions (

Language: Английский

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Recent Advances in Environmentally Friendly Dual‐crosslinking Polymer Networks

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(24)

Published: April 8, 2024

Abstract Environmentally friendly crosslinked polymer networks feature degradable covalent or non‐covalent bonds, with many of them manifesting dynamic characteristics. These attributes enable convenient degradation, facile reprocessibility, and self‐healing capabilities. However, the inherent instability these crosslinking bonds often compromises mechanical properties networks, limiting their practical applications. In this context, environmentally dual‐crosslinking (denoted EF‐DCPNs) have emerged as promising alternatives to address challenge. materials effectively balance need for high ability degrade, recycle, and/or self‐heal. Despite potential, investigations into EF‐DCPNs remain in nascent stages, several gaps limitations persist. This Review provides a comprehensive overview synthesis, properties, applications recent progress EF‐DCPNs. Firstly, synthetic routes rich variety possessing two distinct types (i.e., imine, disulfide, ester, hydrogen bond, coordination other bonds) are introduced. Subsequently, complex structure‐ nature‐dependent mechanical, thermal, electrical discussed, followed by exemplary electronics biotechnology. Finally, future research directions rapidly evolving field outlined.

Language: Английский

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Recent Advances in Environmentally Friendly Dual‐crosslinking Polymer Networks

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(24)

Published: April 8, 2024

Environmentally friendly crosslinked polymer networks feature degradable covalent or non-covalent bonds, with many of them manifesting dynamic characteristics. These attributes enable convenient degradation, facile reprocessibility, and self-healing capabilities. However, the inherent instability these crosslinking bonds often compromises mechanical properties networks, limiting their practical applications. In this context, environmentally dual-crosslinking (denoted EF-DCPNs) have emerged as promising alternatives to address challenge. materials effectively balance need for high ability degrade, recycle, and/or self-heal. Despite potential, investigations into EF-DCPNs remain in nascent stages, several gaps limitations persist. This Review provides a comprehensive overview synthesis, properties, applications recent progress EF-DCPNs. Firstly, synthetic routes rich variety possessing two distinct types (i.e., imine, disulfide, ester, hydrogen bond, coordination other bonds) are introduced. Subsequently, complex structure- nature-dependent mechanical, thermal, electrical discussed, followed by exemplary electronics biotechnology. Finally, future research directions rapidly evolving field outlined.

Language: Английский

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Synthesis of Telechelic Isotactic Polypropylenes for Circular Polypropylene-like Materials via Chain Transfer Polymerization

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

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Solvent‐Free, Degradable Resins for 3D Inkjet Printing Based on Silyl Ether and Amino Acid Phosphoramide Photomonomers

Macromolecular Materials and Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Abstract Inkjet 3D printing is a fast, reliable and noncontact method, capable of producing small large structures enabling multi‐material printing. These characteristics make inkjet an excellent technique for additive manufacturing biomaterials, such as scaffolds tissue engineering. However, the technology restricted by limited number suitable photopolymers which hitherto are to acrylate‐based chemistries, not only toxic but nondegradable, thus use in many biomaterials‐based applications. Herein, unique innovative approach described looking beyond traditional carbon‐based chemistry design synthesize novel photomonomers based on amino acid phosphoramides (APA) with silyl ethers utilizing thiol‐yne click chemistry. The inks specifically designed solventless biomaterials shown be biocompatible having fast tunable degradation rates. This makes these promising material biomedical applications, regeneration.

Language: Английский

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Towards sustainability and a circular Economy: ROMP for the goal of fully degradable and chemically recyclable polymers

European Polymer Journal, Journal Year: 2024, Volume and Issue: 208, P. 112847 - 112847

Published: Feb. 11, 2024

Language: Английский

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Accurate Determination of Reactivity Ratios for Copolymerization Reactions with Reversible Propagation Mechanisms

Macromolecules, Journal Year: 2024, Volume and Issue: 57(14), P. 6727 - 6740

Published: July 9, 2024

An understanding of monomer sequence is required to predict and engineer the properties copolymers. In stochastic polymerizations involving more than one monomer, typically inferred or determined from reactivity ratios, which are measured through copolymerization experiments. The accurate determination ratios copolymerizations where both monomers undergo reversible propagation, however, has been complicated by difficulty in solving underlying population balance equations, presence myriad copolymer equations literature derived under varying assumptions simplifications, lack an easy-to-fit integrated model. Here, we rectify assert consistency between previously reported disparate forms, introduce a new method explicitly solve perform simulations evaluate ability these three methods produce consistent comonomer consumption predictions fits simulated data. We find that all given same input parameters, implies accuracy precision when modeling copolymerization, fitting experimental data, making sequence. Considering this consistency, make recommendation use numerical integration appropriate equation fit real data due its ease implementation. further identify minimum number parameters for suggest ways measure other information ex situ expedite fitting. Finally, practical utility developed herein demonstrated seven distinct sets, span wide range reactivities.

Language: Английский

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Tailored synthesis of circular polyolefins

Nature Sustainability, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Language: Английский

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Spontaneous Amino-Acetoacetate Click Polymerization: A Powerful Tool toward Closed-Loop Recyclable Poly(vinylogous urethane)s

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(17), P. 10718 - 10726

Published: Aug. 22, 2024

The development of click polymerization toward the creation structurally diverse closed-loop recyclable polymers is challenging yet desirable in modern polymer chemistry. In this work, we report a modular amino-acetoacetate polymerization, which proceeds under mild conditions and produces H2O as only byproduct. Through systematic optimization reaction parameters, successfully synthesized 22 poly(vinylogous urethane)s possessing high molecular weights (Mw up to 93.7 kDa) well-defined structures outstanding yields (up 98%). diacetoacetate monomers are derived from diols, both diols diamine common chemicals that can be produced renewable biomass. Notably, these exhibit ability depolymerize back their respective conditions, highlighting excellent recyclability. This enables synthesis with structures, providing versatile platform for fabrication materials such plastics, elastomers, carbon fiber-reinforced composites. methodology material innovations discussed work may benefit promotion application greatly demands scenarios.

Language: Английский

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Accessing Degradable Polyethylene Materials with In-chain Ester Units via Mechanochemical Backbone Editing

Chinese Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Language: Английский

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